Which animal has fingerprints almost identical to a human's?

Koala fingerprints are so close to ours that under a microscope even trained examiners struggle to tell them apart, and there has been periodic speculation - never actually documented in a case - about koala prints contaminating an Australian crime scene.

The striking part is that we are not closely related. Our last common ancestor with a koala lived well over a hundred million years ago, and no other primate outside the apes has prints like this. Chimpanzees and gorillas do, because they inherited them from the same place we did; koalas evolved theirs entirely separately.

That makes it a clean case of convergent evolution - the same solution arrived at twice because the problem was the same. Ridged skin improves grip and, more importantly, gives fine touch sensitivity, and koalas spend their lives making delicate judgements about which eucalyptus leaves are edible with their hands. Two lineages a hundred million years apart, offered the same job, built the same tool.