Compassion Hunters Reference Science 
10,000 Birds
APRIL 5, 2022
There are many more factors than I imagined: compass errors, wind drift, overshooting, extreme weather and irruptions, natural dispersal, and human-driven vagrancy. The chapter on compass errors will probably be the most popular amongst birders who love to discuss reversal and mirror-image migration routes.
10,000 Birds
MAY 19, 2011
Since I was mapping-in human ‘territories’ or home ranges, and trying to figure out how tropical hunter-gatherers found their way around the landscape, the mechanisms of migration were interesting to me. (It It turns out that humans without compasses make no use of magnetic fields.) 2 PIERSMA, T., PÉREZ-TRIS, J.,
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