To animals, we all look the same. Hell, even a lot of humans will commonly mistake people for other people, even when those people don’t really look very similar at all. Species tend to be very good at distinguishing between other members of their own species, whatever that species may be, but not very good at distinguishing between members of other species, cos those circuits need to be able to remember a lot of stuff and need to be good at paying close attention to detail, so they’re very specialised.
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