Originally published at: https://boingboing.net/2024/07/25/scientists-observe-evidence-of-actual-counting-crows.html
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This is “mostly wonderful,” NOT ‘low effort content’:
Thanks Thom!
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Dinosaurs can count?! 
Edited to add a smaller gif.
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Indeed!
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I can’t find a link to the research (probably pre-interwebs), but I recall that some the original “counting crows” research was observers entering and leaving a blind in different numbers and the crows keeping track of if the blind was empty or still had occupants.
The calculating cormorants
Traditional fishing with captive cormorants was observed on the Li-Kiang River. After catching seven fish the birds were allowed to eat the eighth. Without this reward they refused to fish again. These birds could apparently count up to seven.
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