10,000 Birds

FEBRUARY 4, 2020

There’s more, so much more, in this highly informative, detail-packed, research-based description of bird behavior. He aims to bring together all ornithological and ecological research on birds and winter the world over–not just in areas covered by snow–and summarize the findings in non-scientific language.

Research 173

Research Birds Hoarding Sweden 173

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

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 177

Mammals Rodents Birds Reptiles 177