10,000 Birds

SEPTEMBER 8, 2023

And Sandwich Tern is Sandwich Tern, Howell finding the DNA research for splitting it “weak.” They also occasionally show breeding colonies or isolated populations, possible occurrences, and directions of range expansion. © 2007, 2014 text Richard Garrigues, © 2007, 2014 illustrations Marc Roegiers and John K.

Costa Rica 214

Costa Rica Belize El Salvador Birds 214

10,000 Birds

MARCH 23, 2016

As I opined in my post back in 2010 (and continue to preach) the Western Burrowing Owl needs a conservation plan. After five years of waiting and watching, we were so elated with this news of a successful breeding at the preserve that we applied for another grant from Audubon California. Journal of Raptor Research 27:175-179.,

Owls 101

Owls California 2010 Colorado 101

10,000 Birds

JANUARY 26, 2014

The photo above is a breeding-plumaged Myrtle Warbler by Kelly Colgan Azar. A thread on BirdChat two weeks ago reminded me of a fascinating paper that went up online last fall and was published in the January 2014 issue of Evolution: Migration, mitochondria, and the Yellow-rumped Warbler (Toews et al.).

United States 235

United States 2011 Guatemala North America 235

10,000 Birds

NOVEMBER 6, 2018

The guide covers the all–1194 species in the Species Accounts, including 959 native breeding species, 219 Nearctic migrants, 8 breeding visiting species, and 5 introduced species. Of the native breeding species, 112 are endemic or “very nearly endemic.” (Can Press, 2010), The Birds of Costa Rica: A Field Guide, 2nd ed.by

America 213

America El Salvador Costa Rica Honduras 213

10,000 Birds

OCTOBER 5, 2021

Still, I have been stuck trying to identify a dragonfly I photographed in 2010. The material on habitat tells us that sometimes looking for odonates in the tropics means thinking outside the North American box: Bromeliads and water-holding tree holes are breeding locations for certain species, including Blue-winged Helicopter.

Costa Rica 260

Costa Rica North America Family America 260

10,000 Birds

DECEMBER 5, 2017

The Sibley Guide to Birds, 2nd edition (2014) covers 923 species; The Stokes Field Guide to the Birds of North America (2010) 816; Peterson Field Guide to Birds of North America (2008) 544; Smithsonian Field Guide to the Birds of North America (2008) 528; and the Kaufman Field Guide to Birds of North America (2005) covers 392 species.

North America 183

North America America 2017 Birds 183