Along with the anteater, one of two animals in the order Pilosa

I believe the answer is:

sloth

(Other definitions for sloth that I've seen before include "Arboreal animal" , "Deadly sin - upside-down mammal" , "One of the seven deadly sins" , "Jungle mammal; laziness" , "Arboreal creature" .)

I've seen this clue in The New York Times.

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