You see pigeons and other birds go mad when a bunch of breadcrumbs are thrown on the ground, but seem to know not to go for small rocks, earth, and other non edible things even if they were to be thrown in the same way.
Maybe I’m just underestimating the intelligence of pigeons or their keen eyesight? But they seem to know almost instantly what they can and can’t eat.
In: Biology
Crows are extremely intelligent. A crow sitting in a tree 30 metres away from you can see you drop your sandwich and uses calculus to determine if the energy required to go get the sandwich is worth the time and risk
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