Tuesday 21 May Brumback's night monkey (Aotus brumbacki) What’s
the World’s Favourite Species?Find out here. Brumback's night
monkey fact file - Find out more - Print factsheet Brumback's
night monkey description The unusual Brumback’s night monkey
(Aotus brumbacki), also known as Brumback's owl monkey, is a
member of the genus Aotus, the only group of New World monkeys
that are active solely at night (4). The species in this genus
have brown eyes and specialised retinas that result in poor
colour vision, but provide excellent vision in low light levels,
an adaptation to their nocturnal lifestyle (5) (6). Aotus
monkeys range in colour from grey-tan to brown, with paler
orange fur on their stomachs, and can be divided into two
groups, grey-necked and red-necked (7). Brumback’s night monkey
is a member of the grey-necked group, which have greyish or
grizzled brown sides to the neck, and can be distinguished by a
crest of fur between its shoulders (7). Both the male and female
are of a similar size and weight (4