10,000 Birds

JUNE 1, 2021

Interestingly, Chestnut-collared Longspur does appear under its brand-new official name, Thick-billed Longspur, though the description underneath uses the old name. I am particularly happy to see that the bird communication section includes recent research on singing female birds. These are all informative and current.

North America 278

North America America Birds California Condor 278

10,000 Birds

DECEMBER 11, 2018

Several years ago, I read about the enormous colonies of breeding birds in the Northwestern Hawaiian Islands and I did some research to satisfy my curiosity. ( Google Scholar is an excellent resource and free full-text PDFs can be located for many papers, particularly when research is taxpayer-funded.

Transported 113

Transported 2011 Research 2012 113

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 178

North America America 2017 Birds 178