Compassion Document Experience Science 
10,000 Birds
APRIL 5, 2022
The book is richly illustrated with contributions from a group of birders/photographers who were fortunate to see and document many of the vagrants covered. There are many more factors than I imagined: compass errors, wind drift, overshooting, extreme weather and irruptions, natural dispersal, and human-driven vagrancy.
10,000 Birds
MARCH 18, 2011
The experience is one of the ornithological highlights in the world. Geophagy, the intentional consumption of soil by vertebrates, has long been documented in a number of bird and mammal species – including wide-spread use by humans – which consume soil to increase absorption of certain minerals not naturally occurring in the local diet.
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