It’s January and another year list begins. This is what many of us birders do, we start another list. And this doesn’t mean you are obsessed or a little bit too much into birds because keeping track of a year list actually comes with some side benefits. The prospect of identifying a certain number of species in a given amount of time pushes us to pay more attention to birds no matter what the circumstances (although I suggest keeping the exclamations about species identifications to yourself during such solemn situations as funerals, graduations, and watching episodes of The Sopranos).

Yeah, many of us living the birding life do so anyways because we can’t help it. That said, maintaining a year list can provide that extra bit of encouragement to pay even closer attention, to get out there at more breaks of dawn than you wanted, and to subsequently wonder why on Earth we are shivering in some bleak park without seeing or hearing anything. But seriously, the few moments of discomfort are worth it when we hear the faint calls of winter finches drifting through the swishing of dancing pines. The late nights with the mosquito crowd are worth it when the owls finally reveal their lethal soft selves by sound. Most of all, the time and effort is worth it when we see new birds, surpass our goals, and when we share those trying, challenging, exuberant and triumphant times with others because the birding party is always better, always stronger, when you you can enjoy the experience with like-minded souls.

I strongly suggest the experience of sharing Turquoise-browed Motmots.

This is my year list for 2020, the list of the bird species identified from January 1st, 2020 to December 31st, 2020. I don’t know what I will identify but since most or all will be in Costa Rica, there should be a lot. It’s going to be good, it already is, I wish all you other birders out there a fantastic, fulfilling year of birding in 2020! Lifers are in caps and the most outstanding species are in bold. Go birding!

  1. Highland Tinamou – Nothocercus bonapartei; Poas, 4-March
  2. Little Tinamou – Crypturellus soui; Raptor Ridge, 5-Jan
  3. Great Tinamou – Tinamus major; Carara area, 17-Jan
  4. Thicket Tinamou – Crypturellus cinnamomeus; Raptor Ridge, 5-Jan
  5. Slaty-backed Tinamou – Crypturellus boucardi; La Selva, 28-Jan
  6. Black-bellied Whistling-Duck – Dendrocygna autumnalis; Lakeside Catfish farms, 11-Jan
  7. Muscovy Duck – Crypturellus cinnamomeus; La Garita, 8-Jan
  8. Blue-winged Teal – Spatula discors; La Garita, 8-Jan
  9. Northern Shoveler – Spatula clypeata; Lakeside Catfish farms, 11-Jan
  10. Lesser Scaup – Aythya affinis; Sandillal, 11-Jan
  11. MASKED DUCK – Nomonyx dominicas; Ciudad Neily, 25-August
  12. Black Guan – Chamaepetes unicolor; Cinchona, 23-Jan
  13. Crested Guan – Penelope purpurascens; Raptor Ridge, 5-Jan
  14. Gray-headed Chachalaca – Ortalis cinereiceps; La Selva, 28-Jan
  15. Great Curassow – Crax rubra; La Selva, 28-Jan
  16. Crested Bobwhite – Colinus cristatus; Guacalillo, 27-Feb
  17. Buffy-crowned Wood-Partridge – Dendrotyx leucophrys; Orosi area, 6-March
  18. Marbled Wood-Quail – Odontophorus gujanensis; Carara area, 13-March
  19. Black-breeasted Wood-Quail – Odontophorus leucolaemus; Bajo La Paz, 15-March
  20. Tawny-faced Quail – Rhynchortyx cinctus; Laguna Lagarto, 16 Dec
  21. Least Grebe – Tachybaptus dominicus; Lakeside Catfish farms, 11-Jan
  22. Pied-billed Grebe – Podilymbus podiceps; Lagos, 11-Feb
  23. Rock Pigeon – Columba livia; Mata Limon, 6-Jan
  24. Pale-vented Pigeon – Patagioenas cayannensis; La Selva, 28-Jan
  25. Scaled Pigeon – Patagioenas speciosa; Cangreja National Park area, 25-Jan
  26. Red-billed Pigeon – Patagioenas flavirostris; Calle Jocote, 1-Jan
  27. Band-tailed Pigeon – Patagioenas fasciata; Cangreja National Park area, 25-Jan
  28. Short-billed Pigeon – Patagioenas nigrirostris; Carara area, 17-Jan
  29. Ruddy Pigeon – Patagioenas subvinacea; Poas, 4-March
  30. Eurasian Collared-Dove – Streptopelia decaocto; Parrita, 24-August 
  31. Inca Dove – Columbina inca; Calle Jocote, 2-Jan
  32. Common Ground-Dove – Columbina passerina; Curu, 4-Jan
  33. Plain-breasted Ground-Dove – Columbina minuta; Lakeside Catfish farms, 11-Jan
  34. Ruddy Ground-Dove – Columbina talpacoti; Curu, 4-Jan
  35. Blue Ground-Dove – Claravis pretiosa; Carara area, 17-Jan
  36. Ruddy Quail-Dove – Geotrygon montana; Carara area, 19-Jan
  37. Buff-fronted Quail-Dove – Zentrygon costaricensis; Cinchona, 16-Feb
  38. Purplish-backed Quail-Dove – Zebtrygon lawrencii; San Luis Canopy, 11-Feb
  39. White-tipped Dove – Leptotila verreauxi; Calle Jocote, 1-Jan
  40. Gray-chested Dove – Leptotila cassinni; Carara area, 19-Jan
  41. White-winged Dove – Zenaida asiatica; Calle Jocote, 1-Jan
  42. Mourning Dove – Zenaida macroura; Calle Jocote, 2-Jan
  43. Squirrel Cuckoo – Piaya cayana; Curu, 4-Jan
  44. Striped Cuckoo – Tapera naevia; Carara area, 20-Jan
  45. Lesser Ground-Cuckoo – Morococcyx erythropyga; Carara area, 20-Jan
  46. Groove-billed Ani – Crotophaga sulcirostris; Tambor Tropical, 3-Jan
  47. Smooth-billed Ani Crotophaga ani; Ciudad Neily, 25-August
  48. Common Pauraque – Nyctidromus albicollis; Raptor Ridge, 6-Jan
  49. Short-tailed Nighthawk – Lurocalis semitorquatus; Cangreja National Park area, 25-Jan
  50. Lesser Nighthawk – Chordeiiles acutipennis; Jaco, 12-Feb
  51. Great Potoo – Nyctibius grandis; Arenal, 9-Feb
  52. Common Potoo – Nyctibius griseus; Cangreja National Park area, 25-Jan
  53. White-collared Swift – Streptoprocne zonaris; Cangreja National Park area, 25-Jan
  54. Chestnut-collared Swift – Streptoprocne rutila; Calle Jocote, 25-Feb
  55. Black Swift – Cypseloides niger; Villa Flores, 17-May
  56. Spot-fronted Swift – Cypseloides cherriei; Villa Flores, 9-May
  57. Chimney Swift – Chaetura pelagica; Ceiba de Orotina, 17-Oct
  58. Vaux’s Swift – Chaetura vauxi; Calle Jocote, 2-Jan
  59. Gray-rumped Swift – Chaetura cinereiventris; La Selva, 28-Jan
  60. Costa Rica Swift – Chaetura fumosa; Carara area, 19-Jan
  61. Lesser Swallow-tailed Swift – Panyptila cayennensis; Curu, 4-Jan
  62. White-necked Jacobin – Florisuga mellivora; Cangreja National Park area, 25-Jan
  63. White-tipped Sicklebill – Eutoxeres aquila; Cope, 7-Feb
  64. Green Hermit – Phaethornis guy; Cinchona, 23-Jan
  65. Stripe-throated Hermit – Phaethornis striigularis; Curu, 4-Jan
  66. Long-billed Hermit – Phaethornis longirostris; Carara area, 19-Jan
  67. Band-tailed Barbthroat – Threnetes ruckeri; Carara area, 17-Jan
  68. Bronzy Hermit – Glaucis aeneus; Carara, 13-Feb
  69. Green-fronted Lancebill – Doryfera ludovicae; Orosi area, 6-March
  70. Purple-crowned Fairy – Heliothryx barroti; Carara area, 19-Jan
  71. Lesser Violetear – Colibri cyanotus; Poas area, 3-Feb
  72. Brown Violetear – Colibri delphinae; Quebrada Gonzalez, 7-Feb
  73. Green-breasted Mango – Anthracothorax prevostii; Tambor, 5-Jan
  74. Green-crowned Brilliant – Heliodoxa jacula; Cinchona, 23-Jan
  75. Bronze-tailed Plumeleteer – Chalybura urochrysia; La Selva, 28-Jan
  76. Green Thorntail – Discosura conversii; Cinchona, 6-Feb
  77. Black-crested Coquette – Lophornis helenae; Arenal, 9-Feb
  78. White-crested Coquette – Lophornis adorabilis; Cangreja National Park area, 25-Jan
  79. Talamanca Hummingbird – Eugenes spectabilis; Poas, 6-Feb
  80. Fiery-throated Hummingbird – Panterpe insignis; Poas, 6-Feb
  81. Plain-capped Starthroat – Heliomaster constantii; Carara area, 19-Jan
  82. Purple-throated Mountain-gem – Lampornis calolaemus; Poas area, 3-Feb
  83. White-throated Mountain  Lampornis castaneiventris; Cerro Paraguas, 24-August
  84. White-bellied Mountain-gem – Lampornis hemileucus; Cinchona, 23-Jan
  85. Ruby-throated Hummingbird – Archilochus colubris; Raptor Ridge, 5-Jan
  86. Volcano Hummingbird – Selasphorus flammula; Poas area, 3-Feb
  87. Scintillant Hummingbird – Selasphorus scintilla; Poas area, 3-Feb
  88. Magenta-throated Woodstar – Calliphlox bryantae; Corso, 21-Feb
  89. Canivet’s Emerald – Chlorostilbon canivetii; Tempisque, 6-Jan
  90. Garden Emerald Chlorostilbon assimilis; Cerro Paraguas, 24-August
  91. Violet-headed Hummingbird – Klais guimeti; Arenal, 9-Feb
  92. Scaly-breasted Hummingbird – Phaeochroa cuvierii; Curu, 4-Jan
  93. Violet Sabrewing – Campylopterus hemileucurus; Cinchona, 23-Jan
  94. Coppery-headed Emerald – Elvira cupreiceps; Cinchona, 23-Jan
  95. Snowcap – Microchera albocoronata; Rancho Naturalista, 26-Nov
  96. Crowned Woodnymph – Thalurania colombica; Cangreja National Park area, 25-Jan
  97. Black-bellied Hummingbird – Eupherusa nigriventris; Cinchona, 16-Feb
  98. Stripe-tailed Hummingbird – Eupherusa eximia; Corso, 21-Feb
  99. Blue-vented Hummingbird – Amazilia hoffmanni; Curu, 4-Jan
  100. Snowy-bellied Hummingbird Amazilia edward; San Vito, 24-August
  101. Rufous-tailed Hummingbird – Amazilia tzacatl; Calle Jocote, 2-Jan
  102. Blue-chested Hummingbird – Amazilia amabilis; La Selva, 28-Jan
  103. Charming Hummingbird – Amazilia decora; Cangreja National Park area, 25-Jan
  104. Cinnamon Hummingbird – Amazilia rutila; Curu, 4-Jan
  105. Mangrove Hummingbird – Amazilia boucardi; Tarcoles mangroves, 14-Feb
  106. Sapphire-throated HummingbirdLepidopyga  coeruleogularis; Ciudad Neily, 25-August
  107. Blue-throated Goldentail – Hylocharis eliciae; Curu, 4-Jan
  108. American Coot – Fulica americana; Lakeside Catfish farms, 11-Jan
  109. Purple Gallinule – Porphyrio martinicus; Carara area, 17-Jan
  110. Mangrove Rail – Rallus longirostris; Chomes, 25-Sep
  111. Gray-breasted Crake Laterallus exilis; Ciudad Neily, 25-August
  112. White-throated Crake – Laterallus albigularis; La Selva, 28-Jan
  113. Rufous-necked Wood-Rail – Aramides axillaris; Caldera, 14-March
  114. Russet-naped Wood-Rail – Aramides albiventris; Bogarin, 9-Feb
  115. Gray-cowled Wood-Rail – Aramides cajaneus; La Selva, 28-Jan
  116. Uniform Crake – Amaurolimnas concolor; Tirimbina, 27-Jan
  117. Paint-billed Crake Neocrex erythrops; Ciudad Neily, 26-August
  118. Double-striped Thick-Knee – Burhinus bistriatus; Curu, 4-Jan
  119. Black-necked Stilt – Himantopus mexicanus; Tarcoles, 10-Jan
  120. Southern Lapwing –  Vanellus chilensis; Jaco area, 20-Jan
  121. Killdeer – Charadrius vociferus; Turrucares reservoir; 15-March
  122. Black-bellied Plover – Pluvialis squatarola; Punta Morales, 10-Jan
  123. Collared Plover – Charadrius collaris; Tambor, 3-Jan
  124. Wilson’s Plover – Charadrius wilsonia; Punta Morales, 10-Jan
  125. Semipalmated Plover – Charadrius semipalmatus; Punta Morales, 10-Jan
  126. Northern Jacana – Jacana spinosus; Curu, 4-Jan
  127. Upland Sandpiper – Bartramia longicauda; Juan Santamaria Airport, 25-Sep
  128. Whimbrel– Numenius phaeopus; Tarcoles, 10-Jan
  129. Long-billed Curlew – Numenius americanus; Punta Morales, 10-Jan
  130. Marbled Godwit – Limosa fedoa; Punta Morales, 10-Jan
  131. Ruddy Turnstone – Arenaria interpres; Tarcoles, 14-Feb
  132. Red Knot – Calidris canutus; Punta Morales, 25-Sep
  133. Stilt Sandpiper – Calidris himantopus; Punta Morales, 10-Jan
  134. Sanderling – Calidris alba; Tarcoles, 14-Feb
  135. Pectoral Sandpier – Calidris malonotos; Tarcoles, 14-Feb
  136. Buff-breasted Sandpiper – Calidris subruficollis; Juan Santamaria Airport, 25-Sep
  137. Least Sandpiper – Calidris minutilla; Curu, 4-Jan
  138. Semipalmated Sandpiper– Calidris himantopus; Punta Morales, 10-Jan
  139. Western Sandpiper – Calidris mauri; Punta Morales, 10-Jan
  140. Surfbird – Calidris virgata; Guacalillo, 27-Feb
  141. Short-billed Dowitcher – Limnodromus griseus; Punta Morales, 10-Jan
  142. Spotted Sandpiper – Actitis macularius; Paquera, 3-Jan
  143. Willet – Tringa semipalmata; Tambor, 3-Jan
  144. Solitary Sandpiper Tringa solitaria; Ciudad Neily, 25-August
  145. Lesser Yellowlegs Tringa flavipes; Ciudad Neily, 25-August
  146. Greater Yellowlegs – Tringa melanoleuca; Tarcoles, 14-Feb
  147. Wilson’s Phalarope Phalaropus tricolor; Ciudad Neily, 25-August
  148. Gray-hooded Gull – Chroicocephalus cirrocephalus; Punta Morales, 17-Oct
  149. Laughing Gull – Leucophaeus atricilla; Paquera, 3-Jan
  150. Franklin’s Gull – Leucophaeus pipixcan; Paquera, 3-Jan
  151. Western Gull – Larus occidentalis; Puntarenas, 18-March
  152. Gull-billed Tern – Gelochelidon nilotica; Puntarenas, 1-Sep
  153. Royal Tern – Thalasseus maximus; Paquera, 3-Jan
  154. Elegant Tern – Thalasseus elegans; Paquera, 3-Jan
  155. Sandwich Tern – Thalasseus sandvicensis; Paquera, 3-Jan
  156. Common Tern – Sterna hirundo; Paquera, 3-Jan
  157. Black Tern– Chlidonias niger; Paquera, 3-Jan
  158. Black Skimmer – Rynchops niger; Tarcoles, 14-Feb
  159. Sunbittern – Eurypyga helias; Carara, 13-Feb
  160. Wedge-rumped Storm-Petrel – Hydrobates tethys; Puntarenas, 1-Sep
  161. Black Storm-Petrel – Hydrobates melania; Paquera, 3-Jan
  162. Least Storm-Petrel – Hydrobates microsoma; Paquera, 3-Jan
  163. Galapagos Shearwater – Puffinus subalaris; Puntarenas, 14-Sep
  164. Wood Stork – Mycteria americana; Tambor, 3-Jan
  165. Magnificent Frigatebird – Fregata magnificens; Paquera, 3-Jan
  166. Brown Booby – Sula leucogaster; Playa Panama, 11-Jan
  167. Anhinga – Anhinga anhinga; Paquera, 3-Jan
  168. Neotropic Cormorant – Phalacrocorax brasilianus; Paquera, 3-Jan
  169. Brown Pelican – Pelicanus occidentalis; Paquera, 3-Jan Tigrisoma mexicanum
  170. Bare-throated Tiger-Heron – Tigrisoma mexicanum; Tambor, 3-Jan
  171. Fasciated Tiger-Heron – Tigrisoma fasciatum; Rio San Jose, 7-Feb
  172. Great Blue Heron – Ardea herodias; Tambor, 3-Jan
  173. Great Egret – Ardea alba; Tambor, 3-Jan
  174. Little Blue Heron – Egretta caerulea; Tambor, 3-Jan
  175. Snowy Egret – Egretta thula; Tambor, 3-Jan
  176. Tricolored Heron – Egretta tricolor; Tambor, 3-Jan
  177. Reddish Egret – Egretta rufescens; Carara area, 17-Jan
  178. Green Heron – Butorides virescens; Tambor, 3-Jan
  179. Cattle Egret – Bubulcus ibis; Tambor, 3-Jan
  180. Yellow-crowned Night-Heron – Nyctanassa violacea; Tambor, 3-Jan
  181. Black-crowned Night-Heron – Nycticorax nycticorax; Ciudad Neily, 25-August
  182. Boat-billed Heron – Cochlearius cochlearius; Tambor, 3-Jan
  183. Glossy Ibis – Plegadis falcinellus; Ciudad Neily, 25-August
  184. White Ibis – Eudocimus albus; Tambor, 3-Jan
  185. Green Ibis – Mesembrinibis cayannensis; La Selva, 28-Jan
  186. Roseate Spoonbill – Platalea ajaja; Tarcoles, 10-Jan
  187. King Vulture – Sarcoramphus papa; Raptor Ridge, 5-Jan
  188. Black Vulture – Coragyps atrata; Calle Jocote, 1-Jan
  189. Turkey Vulture – Cathartes aura; Calle Jocote, 1-Jan
  190. Lesser Yellow-headed Vulture – Cathartes burrovianus; Jaco area, 13-March
  191. Osprey – Pandion haliaetus; Tarcoles, 10-Jan
  192. Pearl Kite – Gampsonyx swainsonii; Bagaces, 11-Jan
  193. Hook-billed Kite – Chondrohierax uncinatus; Cangreja National Park area, 25-Jan
  194. Gray-headed Kite – Leptodon cayanensis; La Selva, 28-Jan
  195. Swallow-tailed Kite – Elanoides forficatus; Cangreja National Park area, 25-Jan
  196. White-tailed Kite – Elanus leucurus; Calle Jocote, 1-Jan
  197. Double-toothed Kite – Harpagus bidentatus; Carara area, 19-Jan
  198. Black Hawk-Eagle – Spizaetus tyrannus; Cope, 7-Feb
  199. Ornate Hawk-Eagle – Spizaetus ornatus; Orosi area, 7-March
  200. Crane Hawk – Geranospiza caerulescens; Tambor, 3-Jan
  201. Common Black Hawk– Buteogallus anthracinus; Tambor, 3-Jan
  202. Tiny Hawk – Accipiter superciliosus; La Selva area, 24-Feb
  203. Cooper’s Hawk – Accipiter cooperii; Tierras Enamoradas, 8-Nov
  204. Sharp-shinned Haawk – Accipiter striatus; Poas area, 3-Feb
  205. Bicolored Hawk – Accipiter bicolor; Arenal, 10-Feb
  206. Plumbeous Kite – Ictinia plumbea; Tarcoles 14-Feb
  207. White Hawk – Pseudastur albicollis; Raptor Ridge, 5-Jan
  208. Barred Hawk – Morphnarchus princeps; Arenal, 10-Feb
  209. Harriss’s Hawk – Parabuteo unicinctus; Arenal, 9-Feb
  210. White-tailed Hawk – Geranoaetus albicaudatus; Chomes, 25-Sep
  211. Red-tailed Hawk – Buteo jamaicensis; Poas area, 3-Feb
  212. Gray Hawk – Buteo plagiatus; Calle Jocote, 1-Jan
  213. Gray-lined Hawk – Buteo nitidus; Ciudad Neily, 25-August
  214. Short-tailed Hawk – Buteo brachyurus; Calle Jocote, 1-Jan
  215. Zone-tailed Hawk – Buteo albonotatus; Raptor Ridge, 5-Jan
  216. Broad-winged Hawk – Buteo platypterus; Raptor Ridge, 5-Jan
  217. Swainson’s Hawk – Buteo swainsoni; El Gavilan, 5-March
  218. Semiplumbeous Hawk – Leucopternis semiplumbeus; Tirimbina, 9-Feb
  219. Roadside Hawk – Rupornis magnirostris; San Carlos, 23-Jan
  220. Barn Owl – Tyto alba; Villa Flores, 6-Oct
  221. Middle American Screech Owl – Megascops guatemalae; Raptor Ridge, 6-Jan
  222. Tropical Screech Owl – Megascops choliba; Villa Flores, 12-May
  223. Ferruginous Pygmy-Owl – Glaucidium brasilianum; Tambor, 4-Jan
  224. Cenral American Pygmy-Owl – Glaucidium griseiceps; Laguna Lagarto, 15-Dec
  225. Spectacled Owl – Pulsatrix perspicillata; Cope, 7-Feb
  226. Crested Owl – Lophostrix cristata; Cangreja National Park area, 25-Jan
  227. Black-and-white Owl – Ciccaba nigrolineata; Raptor Ridge, 5-Jan
  228. Mottled Owl – Ciccaba virgata; Raptor Ridge, 5-Jan
  229. Striped Owl – Pseudoscops clamator; Jaco, 12-Feb
  230. Slaty-tailed Trogon – Trogon massena; Carara area, 17-Jan
  231. Lattice-tailed Trogon – Trogon clathratus; Socorro, 8-Aug
  232. Baird’s Trogon – Trogon bairdii; Carara area, 19-Jan
  233. Black-throated Trogon – Trogon rufus; Carara area, 17-Jan
  234. Black-headed Trogon – Trogon melanocephalus; Curu, 4-Jan
  235. Gartered Trogon – Trogon caligatus; Curu, 4-Jan
  236. Collared Trogon – Trogon collaris; Poas area, 3-Feb
  237. Elegant Trogon – Trogon elegans; Raptor Ridge, 6-Jan
  238. Resplendent Quetzal – Pharomachrus mocinno; Poas, 6-Feb
  239. Rufous Motmot – Baryphthengus martii; La Selva, 28-Jan
  240. Lesson’s Motmot – Momotus lessonii ; Raptor Ridge, 5-Jan
  241. Keel-billed Motmot – Electron carinatum; Bogarin, 9-Feb
  242. Broad-billed Motmot – Electron platyrhynchum; La Selva, 28-Jan
  243. Turquoise-browed Motmot – Eumomota superciliosa; Raptor Ridge, 5-Jan
  244. Ringed Kingfisher – Megaceryle torquata; Curu, 4-Jan
  245. Amazon Kingfisher – Chloroceryle amazona; Tarcoles, 10-Jan
  246. Green Kingfisher – Chloroceryle americana; Curu, 4-Jan
  247. American Pgmy Kingfisher – Chloroceryle aenea; Carara area, 17-Jan
  248. White-whiskered Puffbird – Malacoptila panamensis; Carara area, 17-Jan
  249. White-necked Puffbird – Notharchus hyperrhynchus; Curu, 4-Jan
  250. Pied Puffbird – Notharchus tectus; La Selva, 28-Jan
  251. White-fronted Nunbird – Monasa morpoeus; La Selva, 28-Jan
  252. Rufous-tailed Jacamar – Galbula ruficauda; Carara area, 17-Jan
  253. Red-headed Barbet – Eupucco bourcierii; Cinchona, 23-Jan
  254. Prong-billed Barbet – Semnornis frantzii; Cinchona, 23-Jan
  255. Keel-billed Toucan – Ramphastos sulfuratus; San Carlos, 23-Jan
  256. Yellow-throated Toucan – Ramphastos ambiguus; Carara area, 17-Jan
  257. Fiery-billed Aracari – Pteroglossus frantzii; Jaco area, 20-Jan
  258. Collared Aracari – Pteroglossus torquatus; Curu, 4-Jan
  259. Northern Emerald Toucanet – Aulacorhynchus prasinus; Cinchona, 23-Jan
  260. Olivaceous Piculet – Picumnus olivaceus; Bijagual road, 2-Feb
  261. Acorn Woodpecker – Melanerpes fomicivorus; Poas, 4-March
  262. Hoffmann’s Woodpecker – Melanerpes hoffmannii; Calle Jocote, 1-Jan
  263. Red-crowned Woodpecker – Melanerpes rubricapillus; Cangreja National Park area, 25-Jan
  264. Golden-naped Woodpecker – Melanerpes chrysauchen; Cangreja National Park area, 25-Jan
  265. Black-cheeked Woodpecker – Melanerpes pucherani; La Selva, 28-Jan
  266. Hairy Woodpecker – Dryobates villosus; Poas, 6-Feb
  267. Smoky-brown Woodpecker – Dryobates fumigatus; Arenal, 11-Feb
  268. Red-rumped Woodpecker – Dryobates kirkii; Ciudad Neily, 25-August
  269. Rufous-winged Woodpecker – Piculus simplex; La Selva, 28-Jan
  270. Chestnut-colored Woodpecker – Celeus castaneus; La Selva, 28-Jan
  271. Cinnamon Woodpecker – Celeus loricatus; La Selva, 28-Jan
  272. Golden-olive Woodpecker – Colaptes rubiginosus; San Luis, 26-Feb
  273. Lineated Woodpecker – Dryocopus lineatus; Calle Jocote, 1-Jan
  274. Pale-billed Woodpecker – Campephilus guatemalensis; Curu, 4-Jan
  275. Laughing Falcon – Herpetotheres cachinnans; Raptor Ridge, 5-Jan
  276. Collared Forest-Falcon – Micrastur semitorquatus; Raptor Ridge, 5-Jan
  277. Crested Caracara – Caracara cheriway; Curu, 4-Jan
  278. Yellow-headed Caracara – Milvago chimachima; Calle Jocote, 1-Jan
  279. Bat Falcon – Falco rufigularis; Curu, 4-Jan
  280. Merlin – Falco columbarius; Villa Flores, 18-Oct
  281. Aplomado Falcon – Falco femoralis; Fortuna, 23-Jan
  282. Peregrine Falcon – Falco peregrinus; Lakeside Catfish farms, 11-Jan
  283. Sulphur-winged Parakeet – Pyrrhurra hoffmanni; Orosi area,8-March
  284. Orange-fronted Parakeet – Eupsittula canicularis; Tambor, 4-Jan
  285. Olive-throated Parakeet – Eupsittula nana; La Selva, 28-Jan
  286. Brown-throated Parakeet – Eupsitulla pertinax; Ciudad Neily, 25-August
  287. Scarlet Macaw – Ara macao; Tambor, 4-Jan
  288. Great Green Macaw – Ara ambiguus; La Selva, 28-Jan
  289. Crimson-fronted Parakeet – Psittacara finschi; Calle Jocote, 1-Jan
  290. Orange-chinned Parakeet – Brotogeris jugularis; Calle Jocote, 1-Jan
  291. Barred Parakeet – Bolborhynchus lineola; Varablanca, 11-March
  292. Brown-hooded Parrot – Pyrilia haematotis; Carara area, 17-Jan
  293. White-crowned Parrot – Pionus senilis; Calle Jocote, 1-Jan
  294. Blue-headed Parrot – Pionus mentruus; Ciudad Neily, 25-August
  295. White-fronted Parrot – Amazona albifrons; Calle Jocote, 1-Jan
  296. Red-lored Parrot – Amazona autumnalis; Curu, 4-Jan
  297. Mealy Parrot– Amazona farinosa; Carara area, 17-Jan
  298. Yellow-naped Parrot – Amazona auropalliata; Esparza, 4-Jan
  299. Streak-chested Antpitta – Hylopezus perspicillatus; Carara area, 17-Jan
  300. Thicket Antpitta – Hylopezus dives; Arenal, 9-Feb
  301. Ochre-breasted Antpitta – Grallaricula flavirostris; Orosi area, 6-March
  302. Black-faced Antthrush – Formicarius analis; Carara area, 17-Jan
  303. Rufous-breasted Antthrush – Formicarius rufipectus; Orosi area, 6-March
  304. Russet Antshrike – Thamnistes anabatinus ; Carara area, 19-Jan
  305. Great Antshrike – Taraba major; Arenal, 9-Feb
  306. Fasciated Antshrike – Cymbilaimus lineatus; La Selva, 28-Jan
  307. Black-hooded Antshrike – Thamnophilus bridgesi; Carara area, 17-Jan
  308. Black-crowned Antshrike – Thamnophilus atrinucha; La Selva, 28-Jan
  309. Barred Antshrike – Thamnophilus doliatus; Tambor, 4-Jan
  310. Streak-crowned Antvireo – Dysithamnus striaticeps; La Selva, 28-Jan
  311. Plain Antvireo – Dysithamnus mentalis; Socorro, 8-Aug
  312. White-flanked Antwren – Myrmotherula axillaris; La Selva, 28-Jan
  313. Slaty Antwren – Myrmotherula schisticolor; Carara area, 19-Jan
  314. Checker-throated Antwren – Epinecrophylla fulviventris; La Selva, 28-Jan
  315. Dot-winged Antwren – Microrhopias quixensis; Carara area, 17-Jan
  316. Zeledon’s Antbird – Myrmeciza zeledoni; Orosi area, 6-March
  317. Chestnut-backed Antbird – Myrmeciza exsul; Carara area, 17-Jan
  318. Dull-mantled Antbird – Myrmeciza laemosticta; Quebrada Gonzalez, 7-Feb
  319. Bicolored Antbird – Gymnopithys bicolor; Quebrada Gonzalez, 7-Feb
  320. Spotted Antbird – Hylophylax naevioides; La Selva, 28-Jan
  321. Ocellated Antbird – Phaenostictus mcleannani; La Selva, 28-Jan
  322. Bare-crowned Antbird – Gymnocichla nudiceps; Arenal, 9-Feb
  323. Dusky Antbird – Cercomacroides tyrannina; Carara area, 19-Jan
  324. Silvery-fronted Tapaculo – Scytalopus argentifrons; Poas area, 3-Feb
  325. Tawny-throated Leaftosser – Sclerurus mexicanus; La Selva, 28-Jan
  326. Plain Xenops – Xenops minutus; Carara area, 17-Jan
  327. Streaked Xenops – Xenops rutilans; Orosi area, 7-March
  328. Ruddy Treerunner – Margarornis rubiginosus; Poas, 6-Feb
  329. Spotted Barbtail – Premnoplex brunnescens; Varablanca, 21-Feb
  330. Scaly-throated Foliage-gleaner – Anabacerthia variegaticeps; Socorro, 8-Aug
  331. Lineated Foliage-gleaner – Syndactyla subalaris; Orosi area, 7-March
  332. Streak-breasted Treehunter – Thripadectes rufobrunneus; Freddo Fresas, 21-Feb
  333. Chiriqui Foliage-gleaner – Automolus exsertus; Carara area, 17-Jan
  334. Buff-throated Foliage-gleaner – Automolus ochrolaemus; Quebrada Gonzalez, 22-Feb
  335. Striped Woodhaunter – Automolus subulatus; Quebrada Gonzalez, 7-Feb
  336. Ruddy Foliage-gleaner – Clibanornis rubiginosus; Caca Botania, 25-August
  337. Red-faced Spinetail – Cranioleuca erythrops; Varablanca, 6-Feb
  338. Slaty Spinetail – Synallaxis brachyura; Cope, 22-Feb
  339. Pale-breasted Spinetail – Synallaxis albescens; Ciudad Neily, 25-August
  340. Brown-billed Scythebill – Campylorhamphus pusillus; Rancho Naturalista, 26-Nov
  341. Wedge-billed Woodcreeper – Glyphorynchus spirurus; Carara area, 17-Jan
  342. Olivaceous Woodcreeper – Sittasomus griseicapillus; Curu, 4-Jan
  343. Tawny-winged Woodcreeper – Dendrocincla anabatina; Carara area, 19-Jan
  344. Ruddy Woodcreeper – Dendrocincla homochroa; Raptor Ridge, 5-Jan
  345. Plain-brown Woodcreeper – Dendrocincla fuliginosa; La Selva, 28-Jan
  346. Northern Barred-Woodcreeper – Dendrocolaptes sanctithomae; Curu, 4-Jan
  347. Cocoa Woodcreeper – Xiphorhynchus susurrans; Carara area, 19-Jan
  348. Black-striped Woodcreeper – Xiphorhynchus lachrymosus; Carara area, 19-Jan
  349. Ivory-billed Woodcreeper – Xiphorhynchus flavigaster; Curu, 4-Jan
  350. Spotted Woodcreeper – Xiphorhynchus erythropygius; Quebrada Gonzalez, 7-Feb
  351. Streak-headed Woodcreeper – Lepidocolaptes souleyetii; Curu, 4-Jan
  352. Spot-crowned Woodcreeper – Lepidocolaptes affinis; Poas, 4-March
  353. Long-tailed Manakin – Chiroxiphia linearis; Curu, 4-Jan
  354. Blue-crowned Manakin – Lepidothrix coronata; Carara area, 17-Jan
  355. White-ruffed Manakin – Corapipo altera; Cangreja National Park area, 25-Jan
  356. Orange-collared Manakin – Manacus aurantiacus; Carara area, 19-Jan
  357. White-collared Manakin – Manacus candei; La Selva, 28-Jan
  358. Red-capped Manakin – Ceratopipra mentalis; Cangreja National Park area, 25-Jan
  359. White-crowned Manakin – Pipra pipra; Quebrada Gonzalez, 22-Feb
  360. Rufous Piha – Lipaugus unirufus; Carara area, 17-Jan
  361. Purple-throated Fruitcrow – Querula purpurata; La Selva, 28-Jan
  362. Three-wattled Bellbird – Procnias tricarunculatus; Cangreja National Park area, 25-Jan
  363. Yellow-billed Cotinga – Carpodectes antoniae; Carara area, 19-Jan
  364. Snowy Cotinga – Carpodectes nitidus; La Selva, 9-Feb
  365. Gray-headed Piprites – Piprites griseiceps; Rancho Naturalista, 26-Nov
  366. Northern Schiffornis – Schiffornis veraepacis; Manuel Brenes road, 11-Feb
  367. Masked Tityra – Tityra semifasciata; Curu, 4-Jan
  368. Black-crowned Tityra – Tityra inquisitor; Cangreja National Park area, 25-Jan
  369. Barred Becard – Pachyramphus versicolor; Poas area, 6-Feb
  370. White-winged Becard – Pachyramphus polychopterus; Raptor Ridge, 5-Jan
  371. Rose-throated Becard – Pachyramphus aglaiae; Curu, 4-Jan
  372. Cinnamon Becard – Pachyramphus ploychopterus; La Selva, 28-Jan
  373. Royal Flycatcher – Onychorhynchus coronatus; Carara area, 17-Jan
  374. Sulphur-rumped Flycatcher – Myiobius sulphureipygius; Carara area, 17-Jan
  375. Ruddy-tailed Flycatcher – Terenotriccus erythrurus; Carara area, 19-Jan
  376. White-throated Spadebill – Platyrinchus mystaceus; Orosi area, 7-March
  377. Stub-tailed Spadebill –  Platyrinchus cancrominus; Carara area, 17-Jan
  378. Golden-crowned Spadebill – Platyrinchus coronatus; Cangreja National Park area, 25-Jan
  379. Ochre-bellied Flycatcher – Mionectes oleagineus; Raptor Ridge, 5-Jan
  380. Olive-striped Flycatcher – Mionectes olivaceus; Poas area, 6-Feb
  381. Slaty-capped Flycatcher – Leptopogon superciliaris; Quebrada Gonzalez, 7-Feb
  382. Scale-crested Pygmy-Tyrant – Lophotriccus pileatus; Quebrada Gonzalez, 7-Feb
  383. Slate-headed Tody-Flycatcher – Poecilotriccus sylvia; Curu, 4-Jan
  384. Common Tody-Flycatcher –  Todirostrum cinereum; Carara area, 17-Jan
  385. Black-headed Tody-Flycatcher – Todirostrum nigriceps; La Selva, 28-Jan
  386. Yellow-margined Flycatcher – Tolmomyias assimilis; La Selva, 28-Jan
  387. Yellow-olive Flycatcher – Tolmomyias sulphurescens; Curu, 4-Jan
  388. Yellow-bellied Tyrannulet – Ornithion semiflavum; Carara, 28-Feb
  389. Brown-capped Tyrannulet – Ornithion brunneicapillus; Gandoca-Manzanillo Reserve, 27-Oct
  390. Northern Bentbill –  Oncostoma cinereigulare; Carara area, 17-Jan
  391. Black-capped Pygmy-Tyrant – Myiornis atricapillus; Poas area, 3-Feb
  392. Eye-ringed Flatbill –  Rhynchocyclus brevirostris; Carara area, 17-Jan
  393. Southern Beardless-Tyrannulet – Camptostoma obsoletum; Carara area, 19-Jan
  394. Northern Beardless-Tyrannulet – Camptostoma imberbe; Curu, 4-Jan
  395. Paltry Tyrannulet – Zimmerius vilissimus; Cangreja National Park area, 25-Jan
  396. Yellow Tyrannulet – Capsiempis flaveola; Jaco area, 20-Jan
  397. Yellow-crowned Tyrannulet – Tyrannulus elatus; Jaco area, 20-Jan
  398. Rufous-browed Tyrannulet – Phylloscartes superciliaris; Socorro, 8-Aug
  399. Greenish Elaenia– Myiopagis viridicata; Curu, 4-Jan
  400. Yellow-bellied Elaenia – Elaenia flavigaster; Calle Jocote, 1-Jan
  401. Lesser Elaenia – Elaenia chiriquensis; El Silencio wetland, 22-June
  402. Mountain Elaenia – Elaenia frantzii; Poas area, 3-Feb
  403. Torrent Tyrannulet – Serpophaga cinerea; Cariblanco, 16-Feb
  404. Bright-rumped Attila – Attila spadiceus; Raptor Ridge, 5-Jan
  405. Rufous Mourner – Rhytipterna holerythra; La Selva, 28-Jan
  406. Dusky-capped Flycatcher – Myiarchus tuberculifer; Curu, 4-Jan
  407. Nutting’s Flycatcher – Myiarchus nuttingi; Raptor Ridge, 5-Jan
  408. Brown-crested Flycatcher Myiarchus tyrannulus– ; Curu, 4-Jan
  409. Great Crested Flycatcher – Myiarchus crinitus; Curu, 4-Jan
  410. Panama Flycatcher – Myiarchus panamensis; Guacalillo, 29-Tarcoles
  411. Great Kiskadee – Pitangus sulphuratus; Calle Jocote, 1-Jan
  412. Boat-billed Flycatcher – Megarynchus pitangua; Calle Jocote, 1-Jan
  413. Gray-capped Flycatcher – Myiozetetes granadensis; Carara area, 20-Jan
  414. Social Flycatcher – Myiozetetes similis; Calle Jocote, 1-Jan
  415. Rusty-margined Flycatcher – Myiozetetes cayanensis; Ciudad Neily, 25-August
  416. White-ringed Flycatcher – Conopias albovittatus; La Selva, 28-Jan
  417. Streaked Flycatcher – Myiodynastes maculatus; Curu, 4-Jan
  418. Sulphur-bellied Flycatcher – Myiodynastes luteiventris; Orosi area, 7-March
  419. Golden-bellied Flycatcher – Myiodynastes hemichrysus; Orosi area, 7-March
  420. Piratic Flycatcher – Legatus leucophaius; Cangreja National Park area, 25-Jan
  421. Western Kingbird – Tyrannus verticalis; Ceiba de Orotina, 29-Nov 
  422. Tropical Kingbird – Tyrannus melancholicus; Calle Jocote, 1-Jan
  423. Eastern Kingbird – Tyrannus tyrannus; San Joaquin, 9-April
  424. Scissor-tailed Flycatcher – Tyrannus forficatus; Lakeside Catfish farms, 11-Jan
  425. Tawny-chested Flycatcher – Aphanotriccus capitalis;Rancho Naturalista, 26-Nov
  426. Tropical Pewee – Contopus cinereus; Curu, 4-Jan
  427. Eastern Wood-Pewee – Contopus virens; Varablanca, 16-Sep
  428. Western Wood-Pewee – Contopus sordidulus; Villa Flores, 9-May
  429. Olive-sided Flycatcher – Contopus cooperi; Villa Flores, 11-Sep 
  430. Dark Pewee – Contopus lugubris; Varablanca, 21-Feb
  431. Tufted Flycatcher – Mitrephanes phaeucercus; Orosi area, 7-March
  432. Alder Flycatcher – Empidonax alnarum; Villa Flores, 9-May
  433. Willow Flycatcher – Empidonax traillii; Ciudad Neily, 25-August
  434. Acadian Flycatcher – Empidonax virescens; Villa Flores, 2-Oct 
  435. Yellow-bellied Flycatcher – Empidonax flaviventris; Curu, 4-Jan
  436. Black-capped Flycatcher – Empidonax atriceps; Poas, 6-Feb
  437. Yellowish Flycatcher – Empidonax flavescens; Varablanca, 21-Feb
  438. Black Phoebe – Sayornis nigricans; Poas area, 6-Feb
  439. Northern Scrub-Flycatcher – Sublegatus arenarum; Curu, 4-Jan
  440. Long-tailed Tyrant – Colonia colonus; La Selva, 28-Jan
  441. Green Shrike-Vireo –  Vireolanius pulchellus; Carara area, 17-Jan
  442. Rufous-browed Peppershrike – Cyclarhis gujanensis; Curu, 4-Jan
  443. Scrub Greenlet –  Hylophilus flavipes; Jaco area, 20-Jan
  444. Tawny-crowned Greenlet –  Tunchiornis ochraceiceps; Carara area, 17-Jan
  445. Lesser Greenlet – Pachysylvia decurtatus; Curu, 4-Jan
  446. Brown-capped Vireo – Vireo leucophrys; Varablanca, 29-Jan
  447. Yellow-winged Vireo – Vireo carmioli; Varablanca, 29-Jan
  448. Mangrove Vireo – Vireo pallens; Curu, 4-Jan
  449. Yellow-throated Vireo – Vireo flavifrons; Curu, 4-Jan
  450. Philadelphia Vireo – Vireo philadelphicus; Curu, 4-Jan
  451. Yellow-green Vireo – Vireo flavoviridis; Tambor, 5-March
  452. Red-eyed Vireo – Vireo olivaceus; San Joaquin, 9-April
  453. White-throated Magpie-Jay – Calocitta formosa; Curu, 4-Jan
  454. Brown Jay – Psilorhinus morio; Calle Jocote, 1-Jan
  455. Purple Martin – Progne subis; Chomes, 25-Sep
  456. Gray-breasted Martin – Progne chalybea; Calle Jocote, 1-Jan
  457. Tree Swallow – Tachycineta bicolor; San Rafael de Varablanca, 11-Sep
  458. Mangrove Swallow – Tachycineta albilinea; Paquera, 3-Jan
  459. Blue-and-white Swallow – Pygochelidon cyanoleuca; Calle Jocote, 1-Jan
  460. Southern Rough-winged Swallow –  Stelgidopteryx ruficollis; Jaco area, 20-Jan
  461. Northern Rough-winged Swallow – Stelgidopteryx serripennis; Calle Jocote, 1-Jan
  462. Cliff Swallow – Petrochelidon phyrronota; Carara area, 13-March
  463. Cave Swallow – Petrochelidon fulva; Ceiba de Orotina, 29-Nov
  464. Barn Swallow – Hirundo rustica; Calle Jocote, 1-Jan
  465. Bank Swallow – Riparia riparia; Villa Flores, 22-April
  466. Scaly-breasted Wren – Microcerculus marginatus; Carara area, 17-Jan
  467. Nightingale Wren – Microcrculus philomela; Quebrada Gonzalez, 7-Feb
  468. House Wren – Troglodytes aedon; Calle Jocote, 1-Jan
  469. Ochraceous Wren – Troglodytes ochraceus; Varablanca, 29-Jan
  470. Band-backed Wren – Campylorhynchus zonatus; La Selva, 28-Jan
  471. Rufous-naped Wren – Campylorhynchus rufinucha; Calle Jocote, 1-Jan
  472. Black-throated Wren – Pheugopedius atrogularis; Arenal, 9-Feb
  473. Spot-breasted Wren – Pheugopedius maculipectus; Grano de Oro, 27-Nov
  474. Rufous-breasted Wren – Pheugopedius rutilus; Carara area, 17-Jan
  475. Black-bellied Wren –  Pheugopedius fasciatoventris; Carara area, 19-Jan
  476. Stripe-breasted Wren – Thryophilus pleurostictus; La Selva, 28-Jan
  477. Rufous-and-white Wren – Thryophilus rufalbus; Curu, 4-Jan
  478. Banded Wren – Thryophilus pleurostictus; Curu, 4-Jan
  479. Canebrake Wren – Cantorchilus zeledoni; Pueblo Nuevo, 28-Jan
  480. Cabanis’s Wren – Cantorchilus modestus; Calle Jocote, 1-Jan
  481. Isthmian Wren – Cantorchilus elutus; Ciudad Neily, 25-August
  482. Riverside Wren – Cantorchilus semibadius; Carara area, 17-Jan
  483. Bay Wren – Cantorchilus nigricapillus; La Selva, 28-Jan
  484. White-breasted Wood-Wren – Henicorhina leucosticta; La Selva, 28-Jan
  485. Gray-breasted Wood-Wren – Henicorhina leucophyrs; Poas area, 3-Feb
  486. Song Wren – Cyphorhinus phaeocephalus; La Selva, 28-Jan
  487. Tawny-faced Wren – Microbates cinereiventris; Quebrada Gonzalez, 7-Feb
  488. Long-billed Gnatwren – Ramphocaenus melanurus; Curu, 4-Jan
  489. White-lored Gnatcatcher – Polioptila albiloris; Curu, 4-Jan
  490. Tropical Gnatcatcher – Polioptila plumbea; Curu, 4-Jan
  491. American Dipper – Cinclus mexicanus; Cariblanco, 16-Feb
  492. Black-faced Solitaire – Myadestes melanops; Poas, 6-Feb
  493. Black-billed Nightingale-Thrush – Catharus gracilirostris; Poas area, 3-Feb
  494. Orange-billed Nightingale-Thrush – Catharus aurantiirostris; Raptor Ridge, 5-Jan
  495. Ruddy-capped Nightingale-Thrush – Catharus frantzii; Poas area, 3-Feb
  496. Slaty-backed Nightingale-Thrush – Catharus fuscater; Orosi area, 7-March
  497. Black-headed Nightingale-Thrush– catharus mexicanus; Quebrada Gonzalez, 7-Feb
  498. Swainson’s Thrush – Catharus ustulatus; Raptor Ridge, 5-Jan
  499. Gray-cheeked Thrush – Catharus minimus; Villa Flores, 17-Oct
  500. Sooty Thrush – Turdus nigrescens; Poas area, 3-Feb
  501. Mountain Thrush – Turdus plebejus; Poas, 6-Feb
  502. Clay-colored Thrush – Turdus grayi; Calle Jocote, 1-Jan
  503. Pale-vented Thrush – Turdus obsoletus; La Selva, 28-Jan
  504. White-throated Thrush – Turdus assimilis; Arenal, 10-Feb
  505. Wood Thrush – Hylocichla mustelina; Carara area, 17-Jan
  506. Tropical Mockingbird – Mimus gilvus; Tirimbina, 23-Feb
  507. Black-and-yellow Silky-Flycatcher – Phainoptila melanoxantha; Poas area, 3-Feb
  508. Long-tailed Silky-Flycatcher – Ptiliogonys caudatus; Poas area, 3-Feb
  509. House Sparrow – Passer domesticus; Calle Jocote, 1-Jan
  510. Golden-browed Chlorophonia – Chlorophonia callophrys; Poas area, 3-Feb
  511. Elegant Euphonia – Euphonia elegantissima; Cangreja National Park area, 25-Jan
  512. Yellow-crowned Euphonia – Euphonia luteicapilla; Carara area, 17-Jan
  513. Scrub Euphonia – Euphonia affinis; Curu, 4-Jan
  514. White-vented Euphonia – Euphonia minuta; Socorro, 8-Aug
  515. Tawny-capped Euphonia – Euphonia anneae; Quebrada Gonzalez, 7-Feb
  516. Olive-backed Euphonia – Euphonia gouldi; La Selva, 28-Jan
  517. Spot-crowned Euphonia – Euphonia imitans; Carara area, 17-Jan
  518. Yellow-throated Euphonia – Euphonia hirundinacea; Curu, 4-Jan
  519. Thick-billed Euphonia – Euphonia laniirostris; Ciudad Neily, 25-August
  520. Yellow-bellied Siskin – Spinus xanthogastra; Varablanca, 8-Nov 
  521. Lesser Goldfinch – Spinus psaltria; San Vito, 24-August
  522. Common Chlorospingus – Chlorospingus flavopectus; Cinchona, 23-Jan
  523. Sooty-capped Chlorospingus – Chlorospingus pileatus; Poas area, 3-Feb
  524. White-eared Ground-Sparrow – Melozone leucotis; Poas area, 3-Feb
  525. Cabanis’s Ground-Sparrow – Melozone cabanisi; Villa San Ignacio, 6-Feb
  526. Olive Sparrow – Arremonops rufivirgatus; Raptor Ridge, 5-Jan
  527. Black-striped Sparrow –  Arremonops conirostris; Jaco area, 20-Jan
  528. Stripe-headed Sparrow – Peucaea ruficauda; Curu, 4-Jan
  529. Large-footed Finch – Pezopetes capitalis; Poas, 6-Feb
  530. Orange-billed Sparrow – Arremon aurantiirostris; Carara area, 17-Jan
  531. Sooty-faced Finch – Arremon crassirostris; Braulio Carrillo, 5-March
  532. Yellow-thighed Brushfinch – Arremon tibialis; La Selva, 28-Jan
  533. Costa Rican Brushfinch – Arremon costaricensis; Cangreja National Park area, 25-Jan
  534. Chestnut-capped Brushfinch – Arremon brunneinuchus; Cinchona, 23-Jan
  535. White-naped Brushfinch – Atlapetes albinucha; Cinchona, 6-Feb
  536. Rufous-collared Sparrow – Zonotrichia capensis; Varablanca, 29-Jan
  537. Grasshopper Sparrow – Ammodramus savannarum; Ceiba de Orotina, 29-Nov
  538. Eastern Meadowlark – Sturnella magna; Curu, 4-Jan
  539. Red-breasted Meadowlark –  Strunella leistes; Jaco area, 20-Jan
  540. Yellow-billed Cacique – Amblycercus holosericeus; Raptor Ridge, 5-Jan
  541. Chestnut-headed Oropendola – Psarcolius wagleri; La Selva, 28-Jan
  542. Crested Oropendola – Psarcolius decumanus; San Vito, 24-August
  543. Montezuma Oropendola – Montezuma Oropendola; Calle Jocote, 1-Jan
  544. Scarlet-rumped Cacique – Cacicus uropygialis; La Selva, 28-Jan
  545. Black-cowled Oriole – Icterus prosthemelas La Selva, 28-Jan
  546. Orchard Oriole – Icterus spurius; Lakeside Catfish farms, 11-Jan
  547. Spot-breasted Oriole – Icterus pectoralis; Hotel Robledal, 29-Feb
  548. Streak-backed Oriole – Icterus pustulatus; Lakeside Catfish farms, 11-Jan
  549. Baltimore Oriole – Icterus galbula; Calle Jocote, 1-Jan
  550. Red-winged Blackbird – Agelaius phoeniceus; Lakeside Catfish farms, 11-Jan
  551. Shiny Cowbird – Molothrus bonariensis; Jaco, 12-Feb
  552. Bronzed Cowbird – Molothrus aeneus; Calle Jocote, 1-Jan
  553. Giant Cowbird – Molothrus oryzivorus; Calle Jocote, 1-Jan
  554. Melodious Blackbird – Dives dives; Calle Jocote, 1-Jan
  555. Great-tailed Grackle – Quiscalus mexicanus; Calle Jocote, 1-Jan
  556. Wrenthrush – Zeledonia coronata; Poas area, 3-Feb
  557. Worm-eating Warbler – Helmitheros vermivorum; Raptor Ridge, 5-Jan
  558. Northern Waterthrush – Parkesia noveboracensis; Curu, 4-Jan
  559. Louisiana Waterthrush – Parkesia motacilla; Orosi area, 7-March
  560. Golden-winged Warbler – Vermivora chrysoptera; Quebrada Gonzalez, 7-Feb
  561. Black-and-white Warbler – Mniotilta varia; Curu, 4-Jan
  562. Prothonotary Warbler – Protonotaria citrea; Curu, 4-Jan
  563. Flame-throated Warbler – Oreothlypis gutturalis; Varablanca, 29-Jan
  564. Tennessee Warbler – Leiothlypis peregrina; Calle Jocote, 1-Jan
  565. Gray-crowned Yellowthroat – Geothlypis poliocephala; Curu, 4-Jan
  566. Olive-crowned Yellowthroat – Geothlypis semiflava; La Selva, 28-Jan
  567. MacGillivray’s Warbler – Geothlypis tolmiei; Poas area, 16-Feb
  568. Mourning Warbler – Geothlypis philadelphia; Calle Jocote, 1-Jan
  569. Kentucky Warbler – Geothlypis formosa; Curu, 4-Jan
  570. Yellow Warbler – Setophaga petechia; Calle Jocote, 1-Jan
  571. American Redstart –  Setophaga ruticilla; Jaco area, 20-Jan
  572. Chestnut-sided Warbler – Setophaga pensylvanica; Raptor Ridge, 5-Jan
  573. Yellow-rumped Warbler – Setophaga coronata; Arenal, 11-Feb
  574. Palm Warbler – Setophaga palmarum; La Fortuna, 23-Jan
  575. Cerulean Warbler – Setophaga cerulea; Villa Flores, 20-Sep 
  576. Tropical Parula –  Setophaga pitiayumi; Jaco area, 20-Jan
  577. Blackburnian Warbler – Setophaga fusca; Varablanca, 29-Jan
  578. Bay-breasted Warbler – Setophaga castanea; Gandoca-Manzanillo Reserve, 27-Oct
  579. Black-throated Green Warbler – Setophaga virens; Poas area, 3-Feb
  580. Wilson’s Warbler – Cardellina pusilla; Varablanca, 29-Jan
  581. Canada Warbler – Cardellina canadensis; Virgen del Socorro, 16-Sep
  582. Slate-throated Redstart – Myioborus miniatus; Varablanca, 29-Jan
  583. Collared Redstart – Myioborus coronatus; Varablanca, 29-Jan
  584. Buff-rumped Warbler – Myiothlypis fulvicauda; Carara area, 17-Jan
  585. Rufous-capped Warbler – Basileuterus rufifrons; Curu, 4-Jan
  586. Black-cheeked Warbler – Basileuterus melanogenys; Poas, 6-Feb
  587. Costa Rican Warbler – Basileuterus melanotis; Varablanca, 21-Feb
  588. Golden-crowned Warbler – Basileuterus culicivorus; Arenal, 11-Feb
  589. Dusky-faced Tanager – Mitrospingus cassinii; Quebrada Gonzalez, 7-Feb
  590. Hepatic Tanager – Piranga flava; Arenal, 11-Feb
  591. Summer Tanager – Piranga rubra; Calle Jocote, 1-Jan
  592. Scarlet Tanager – Piranga olivacea; Villas Flores, 16-April
  593. Western Tanager – Piranga ludoviciana; Raptor Ridge, 5-Jan
  594. Flame-colored Tanager – Piranga bidentata; Poas, 6-Feb
  595. White-winged Tanager – Piranga leucoptera; Orosi area, 7-March
  596. Red-crowned Ant-Tanager– Habia rubica; Raptor Ridge, 5-Jan
  597. Red-throated Ant-Tanager – Habia fuscicauda; La Selva, 28-Jan
  598. Black-faced Grosbeak – Caryothraustes poliogaster; La Selva, 28-Jan
  599. Carmiol’s Tanager – Chlorothraupis carmioli; Quebrada Gonzalez, 7-Feb
  600. Rose-breasted Grosbeak – Pheucticus ludovicianus; Raptor Ridge, 5-Jan
  601. Black-thighed Grosbeak – Pheucticus tibialis; Poas, 4-March
  602. Blue-black Grosbeak – Cyanocompsa cyanoides; Raptor Ridge, 5-Jan
  603. Blue Grosbeak – Passerina caerulea; Lakeside Catfish farms, 11-Jan
  604. Indigo Bunting – Passerina cyanea; Lakeside Catfish farms, 11-Jan
  605. Painted Bunting – Passerina ciris; Raptor Ridge, 5-Jan
  606. Dickcissel – Spiza americana; Lakeside Catfish farms, 11-Jan
  607. Bay-headed Tanager – Tangara gyra; Varablanca, 29-Jan
  608. Rufous-winged Tanager – Tangara lavinia; Arenal, 10-Feb
  609. Spangle-cheeked Tanager – Tangara dowii; Poas area, 3-Feb
  610. Silver-throated Tanager – Tangara icterocephala; La Selva, 28-Jan
  611. Golden-hooded Tanager –  Stilpnia larvata; Carara area, 19-Jan
  612. Speckled Tanager – Tangara guttata; Quebrada Gonzalez, 7-Feb
  613. Emerald Tanager – Tangara florida; Quebrada Gonzalez, 7-Feb
  614. Plain-colored Tanager – Tangara inornata; La Selva area, 24-Feb
  615. Blue-gray Tanager – Thraupis episcopus; Calle Jocote, 1-Jan
  616. Palm Tanager – Thraupis palmarum; Curu, 4-Jan
  617. Gray-headed Tanager –  Eucometis penicillata; Carara area, 19-Jan
  618. White-shouldered Tanager – Tachyphonus luctuosus; Carara area, 17-Jan
  619. Scarlet-rumped Tanager – Ramphocelus passerinii; Carara area, 20-Jan
  620. Crimson-collared Tanager – Ramphocelus sanguinolentus; La Selva, 28-Jan
  621. Blue-black Grassquit – Volatinia jacarina; Calle Jocote, 1-Jan
  622. Slaty Flowerpiercer – Diglossa plumbea; Poas area, 3-Feb
  623. Green Honeycreeper – Chlorophanes spiza; La Selva, 28-Jan
  624. Scarlet-thighed Dacnis – Dacnis venusta; Cangreja National Park area, 25-Jan
  625. Shining Honeycreeper – Cyanerpes lucidus; Cangreja National Park area, 25-Jan
  626. Red-legged Honeycreeper – Cyanerpes cyaneus; Curu, 4-Jan
  627. Blue Dacnis – Dacnis cayana; Carara area, 2-Feb
  628. Black-and-yellow Tanager – Chrysothlypis chrysomelas; Quebrada Gonzalez, 7-Feb
  629. Sulphur-rumped Tanager – Heterospingus rubrifrons; Gandoca-Manzanillo Reserve, 27-Oct
  630. Tawny-crested Tanager – Tachyphonus delattrii; Quebrada Gonzalez, 7-Feb
  631. White-throated Shrike-Tanager – Lanio leucothorax; Quebrada Gonzalez, 7-Feb
  632. Bananaquit – Coereba flaveola; Cangreja National Park area, 25-Jan
  633. Yellow-faced Grassquit – Tiaris olvaceus; Poas area, 3-Feb
  634. Thick-billed Seed-Finch – Sporophila funerea; Jaco, 13-Feb
  635. Nicaraguan Seed-Finch – Sporophila nuttingi; Pueblo Nuevo, 28-Jan
  636. Slate-colored Seedeater – Sporophila schistacea; Jaco area, 20-Jan
  637. Yellow-bellied Seedeater – Sporophila nigricollis; San Vito, 25-August
  638. Ruddy-breasted Seedeater – Sporophila minuta; Ciudad Neily, 25-August
  639. Variable Seedeater – Sporophila corvina; Curu, 4-Jan
  640. Morelet’s Seedeater – Sporophila morelleti; Curu, 4-Jan
  641. Slate-colored Grosbeak – Saltator grossus; La Selva, 9-Feb
  642. Black-headed Saltator – Saltator atricpes; La Selva, 28-Jan
  643. Buff-throated Saltator – Saltator maximus; Curu, 4-Jan
  644. Grayish Saltator – Saltator coerulescens; Calle Jocote, 1-Jan

Written by Patrick O'Donnell
Patrick O'Donnell became a birder at the age of 7 after seeing books about birds in the Niagara Falls, New York public library. Although watching thousands of gulls in the Niagara Gorge was sublime, more bird species (and warmer weather) eventually brought him to Mexico, Costa Rica, Ecuador, and other very birdy tropical places. A biologist by training, he has worked on bird-related projects in Colorado, Washington, Peru, and other locales, and has guided birders in Peru, Ecuador, and Costa Rica. These days, he lives in Costa Rica where he juggles guiding, freelance writing, developing bird apps for Costa Rica and Panama, posting on his Costa Rica birding blog, and discussing dinosaurs with his young daughter.