10,000 Birds

DECEMBER 14, 2021

As of mid-November 2021, the Collaborative had submitted more than 4,200 checklists (up from 1,700 in 2018) and has observed 691 species in the United States (up from 618). Thus, there are now seven states with 200+ observed species. The state with the largest increase was Arizona , with 139 species added.

United States 207

United States West Virginia Puerto Rico Minnesota 207

10,000 Birds

NOVEMBER 13, 2018

As of mid-October 2018, the Collaborative had submitted more than 1,700 checklists and observed 618 species in the United States. The heat map is revealing: Unsurprisingly for a site founded and run by two New Yorkers (one of whom literally wrote the book on birding New York), the Empire State boasts the highest number of species (316).

Rhode Island 114

Rhode Island United States West Virginia Puerto Rico 114

10,000 Birds

SEPTEMBER 9, 2016

According to the data the authors gathered from banded and recovered Blue Jays , the species shows both a northward post-breeding dispersal (which we’re probably seeing right now, in September) and a southward migration. That last bit is my own interpretation of the data.)

Alabama 106

Alabama West Virginia New York City New York 106

10,000 Birds

DECEMBER 22, 2018

Although I didn’t make any efforts to chase birds or attain a big year list, regular guiding and birding in various parts of the country still rewarded me with more than 640 species in Costa Rica. I didn’t see many species actually. It’s not that often that I add a species to my country list. Shorebirds.

Costa Rica 175

Costa Rica 2018 Birds West Virginia 175