Plural of aotus; a genus of small nocturnal primates native to Central and South America, commonly called night monkeys or owl monkeys.
From Greek 'a-' (without) plus 'ous' (ear), referring to the small or inconspicuous ears of these primates. The genus name reflects their nocturnal habits and distinctive appearance compared to other primates.
Night monkeys are the only truly nocturnal monkeys in the world, and their large forward-facing eyes adapted for night vision make them look eerily owl-like—giving them a completely different niche than their day-active cousins!
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