What animal has fingerprints so similar to humans that they confuse even the best experts?

They’re very cuddly – Koala Bears.

Top row: Standard ink fingerprints of an adult male koala (left) and adult male human (right). Bottom row: Scanning electron microscope images of epidermis covering fingertips of the same koala (left) and the same human (right). (Image credit: Macie Hennenberg, et al. and naturalSCIENCE)