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
I would say experience. I mean you can eat a kiwifruit but not a tennis ball. They are both roundish and hairy but you still know which one you can eat and which one you can’t.
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