10,000 Birds

OCTOBER 21, 2015

Heermann’s Gulls form large breeding colonies on arid islands in the Gulf of California, Mexico, from March through July. The largest colony exists on Isla Raza, where an estimated 90–95% of the total world population breeds 1. This photo by Basar from Wikipedia Commons shows the adult in breeding plumage.

San Francisco 159

San Francisco North America Seals Sanctuary 159

10,000 Birds

OCTOBER 6, 2015

Here are some things I’ve learned from the Peterson Reference Guide to Owls of North America and the Caribbean by Scott Weidensaul: The Burrowing Owl is the only North American owl species where the male is larger than the female, albeit, only slightly larger. And the term is ‘non-reversed size dimorphism.’).

North America 233

North America Owls America Dominican Republic 233

10,000 Birds

SEPTEMBER 9, 2015

Their habitats vary widely in both rural and urban landscapes; open habitats are preferred and the species generally shuns only extensively forested areas and wetlands 1. To show how adaptive this species is, the following photograph was sent to me by one of my readers and I use it with her permission.

Hunters 180

Hunters Hunting North America Game 180

10,000 Birds

MARCH 2, 2015

I doubt we have to worry about Herring Gulls , Ruby-throated Hummingbirds or California Towhees going extinct, though their abundance and distribution will surely shift in time. That said, there are many species we should be extremely concerned about. The Pika’s story is shared with a number of montane bird species.

North America 226

North America Birds San Francisco Suffering 226

10,000 Birds

FEBRUARY 8, 2017

Breeding bird surveys appears to show the resplendent Allen’s Hummingbird (like Corey’s capture, above) in decline—but not in Southern California, where examination of eBird data reveals that members of a residential population appear to be faring much better than their migrating brethren. sports championships ).

Massachusetts 100

Massachusetts Eggs Falcons Rights 100

10,000 Birds

NOVEMBER 6, 2015

There are many charismatic endangered birds that capture people’s hearts and imaginations: the colossal California Condor , the evocative Red-crowned Crane , and the adorable Spoon-billed Sandpiper come to mind. Regardless of their popularity, these species and the threatened ecosystems they inhabit are equally spectacular.

Ecuador 207

Ecuador California Condor Blackbirds Parrots 207

10,000 Birds

JULY 26, 2012

Aplomado Falcon ( Falco femoralis ) by Jon David Nelson Shakeups for shearwaters and murrelets Xantus’s Murrelet ( Synthliboramphus hypoleucus ) has been split into California-breeding Scripps’s Murrelet ( Synthliboramphus scrippsi ) and Baja-breeding Guadalupe Murrelet ( Synthliboramphus hypoleucus ).

Falcons 174

Falcons Parrots California Breeding 174

10,000 Birds

MARCH 23, 2016

That original installation (pictured above) was part of a series of 40 artificial burrows created at three separate locations, all made possible by a grant from Audubon California. This property is located in northern Butte County which is nearing the (dwindling) northern most historic range for this species in California.

Owls 101

Owls California 2010 Colorado 101

10,000 Birds

JUNE 1, 2021

Pough “with illustrations in color of every species” by Don Eckelberry, Doubleday, 1946. The National Audubon Society Birds of North America covers all species seen in mainland United States, Canada and Baja California. The press material says it covers over 800 species, so you know I had to do a count.

North America 279

North America America Birds California Condor 279

10,000 Birds

APRIL 2, 2019

I like observing them, reading about them, grappling with species and subspecies identification, and even—on a good day—talking about sparrow taxonomy. Peterson Reference Guide to Sparrows of North America covers 61 species of the New World sparrow family Passerellidae that breed in Canada, the United States, and northern Mexico.

North America 157

North America Sparrows America United States 157

10,000 Birds

MARCH 29, 2017

You see, up to this point, let’s say 1972, perhaps 1973, I had never really been exposed to a “Threatened, or Endangered” species of any kind. The State of Oregon, in 1975 listed the bird as Threatened, and the Oregon Fish and Wildlife reaffirmed that status in 1989 under the Oregon Endangered Species Act.

Oregon 103

Oregon Defenders Of Wildlife Endangered Species Mexico 103

10,000 Birds

MAY 30, 2019

such as California Condors and Passenger Pigeons. His parents moved where opportunity beckoned, taking him from San Angelo, Texas, to Columbus, New Mexico, then to Dallas, and finally on to California. Again, Cade led with solid evidence acquired through his own research. And grow they did.

Falcons 190

Falcons California Condor Alaska Texas 190

10,000 Birds

AUGUST 21, 2018

Major extinction events that are geologically instantaneous have been followed by periods of time with reduction of species or unstable habitats that last for hundreds of thousands or millions of years. There are about 10,000 species of them, after all, which is a lot for a vertebrate. Here, according to the research , there is.

2018 101

2018 Science Humane Species 101

10,000 Birds

MARCH 17, 2013

New World populations of the widely distributed Sandwich Tern ( Thalasseus sandvicensis ) are treated by some authorities (including the British Ornithologists’ Union) as a distinct species: Cabot’s Tern ( T. Proposal 2013-A-7 would split the Sage Sparrow ( Amphispiza belli ) into two species: Great Basin Sage Sparrow ( A.

2013 193

2013 Sparrows Owls Stray 193

10,000 Birds

FEBRUARY 17, 2015

If this was America, we might not be concerned because starlings are an invasive species, at least in North America. Last year, beginning about Halloween, thousands of juvenile auklets started washing ashore dead from California’s Farallon Islands to Haida Gwaii (also known as the Queen Charlotte Islands) off central British Columbia.

Science 152

Science Iraq Research Birds 152

10,000 Birds

DECEMBER 5, 2017

The 7th edition of the National Geographic Field Guide to the Birds of North America covers 1,023 species that reside, migrate, or have been documented as accidentals or exotics in North America. Species Accounts: With 1,023 species, National Geographic 7 continues to cover the most species of any North American field guide.

North America 187

North America America 2017 Birds 187

10,000 Birds

JULY 18, 2012

Others, like the petrels and some of the auks, will lay a single egg per breeding attempt. The investment placed in each clutch bur seabirds is so great that only one breeding attempt can be seen to completion each year. They are cavity nesters, breeding in natural cavities or holes dug into the soil.

Eggs 166

Eggs Puffins Breeding Raised 166

10,000 Birds

JULY 7, 2020

This is a delightful book, large (8-1/2 by 11 inches), filled with Sibley’s distinctive artwork and an organized potpourri of research-based stories about the science behind bird’s lives. His field guides are known for images that simultaneously portray notable field marks and also the ‘personality’ of a bird species.

2020 264

2020 Birds Groups North America 264

10,000 Birds

NOVEMBER 6, 2018

Covering 1,261 species with data and taxonomy current up to August 2017, the field guide is an exciting achievement. And, then there are the more familiar birds–Wood-warblers, sandpipers, hawks–some species migrants, some species with a wide range. Can you guess which of the species cited above are endemic?

America 214

America El Salvador Costa Rica Honduras 214

10,000 Birds

NOVEMBER 30, 2018

So, while waiting for evolution to produce new birds for our life lists is inadvisable, we sometimes catch a break and every few years get a new species or two when some genetic research or study of breeding distribution presents enough evidence to split what was once considered a single species into a few new ones.

Ohio 113

Ohio India Hawaii United States 113

10,000 Birds

JUNE 17, 2015

The Refuge is now home to nearly 200 species of birds, over 50 species of mammals, 25 species of reptiles and amphibians, and a wide variety of insects, fish and plants. The Service also proposes expanding hunting and sport fishing on the following refuges: California.

Fish 145

Fish Wildlife Hunting Game 145

10,000 Birds

MARCH 1, 2012

It covers 70 seabird species, explaining specific identification points with over 900 photographs and highly detailed descriptive text, all backed by an expertise based on years of research in the field, examination of museum specimen, and knowledge of ornithological literature. First of all, what are tubenoses?

North America 159

North America Albatross America Species 159