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 211

America El Salvador Costa Rica Honduras 211

10,000 Birds

FEBRUARY 4, 2020

The book offers numerous facts about many species, findings of hundreds of research projects, notes on trends and exceptions from the norm, but little that captures the poetry of winter bird behavior or ignites a passion for change. Page 53, Illustration by Margaret La Farge, used by permission of Princeton University Press, [link].

Research 165

Research Birds Hoarding Sweden 165

10,000 Birds

JULY 21, 2011

Here’s some data from the famous research project of Manu, Peru, giving biomass in kilograms per hectare. There are probably other major trends that depend, for example, on latitude and timing. But if you look at a bit of prairie in South Dakota during the dead of winter, you may see very few birds and a lot of bison.

Mammals 172

Mammals Rodents Birds Reptiles 172