Sloths are divided into two large groups: Bradypus, the three-fingered sloths that include the famous smiley and masked-face sloths, and Choloepus, the brownish ones with a pig-like nose and two fingers on each hand.

Etymology is the study of words, particularly, the history of words. Thus, the etymology of a word is its origin and developmental history. So what is the etymology of the word sloth? And how does its scientific and common name share the same meaning?

Cliffe, R.N. and Haupt, R.J., 2018. Hanging out for a drink. Frontiers in Ecology & the Environment, 16(8).