National Geographic : 1938 May
© National Geographic Society OWL MONKEYS, OR DOUROUCOULIS, SEE AT NIGHT Nocturnal, these tropical Americans spend the day in hollow trees. When disturbed, they peer out sleepily with big blinking eyes. Tempting tidbits to DoUROUCOULIs are giant spiders and centipedes. rainungs Dy r.ne ,neveriange SQUIRREL MONKEYSARE "BRAINY" BUT NOT OVER-BRIGHT! Their brain extends far tothe back oftheskull and, inproportion to the body, is actually largerthan aman's. These small South Americans, also known as "moss monkey" and "titi," live chiefly inlarge groups.