today's mouse: one time a while back I tried putting a tiny bit of peanut butter on the glass of the mice tank, resulting in some very funny pictures-- and also a very good way to see what a mouse's paw looks like up close! The front paws have 4 fingers, like this, but the back paws have 5.
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in reply to @dailymice's post:
Guinea pigs are 4 in the front, 3 in the back. I wonder if that's because guinea pigs can't climb vertical surfaces, so they don't need to grip with their hind feet the way mice might? Or it's just an accident of evolution.
oh I didn't know that about guinea pigs! But I agree it makes sense that it'd be for grip reasons-- I definitely see mice use their back paws to grip things for climbing purposes. (They also loosely wrap their tails around things for balance when climbing, which is super cute)