significantly different from another, a characteristic adapted for visual facial
recognition in social interaction.
Orangutans can grasp things with both their hands and their feet.
They have a large, bulky body, a thick neck, very long, strong arms, short, bowed
legs, and no tail. They are mostly covered with long reddish-brown hair, although
this differs between the species: Sumatran Orangutans have a more sparse and
lighter coloured coat.
The orangutan has a large head with a prominent mouth
area. Adult males have large cheek flaps (which get larger as the ape ages) that
show their dominance to other males and their readiness to mate.
superficially more closely resemble
than most great apes do.
Gibbons are masters of their primary mode of locomotion,
from branch to branch. They can also make leaps of up to 8 m (26 ft), and walk
bipedally with their arms raised for balance. They are the fastest and most agile of
all tree-dwelling, non-flying mammals.
Depending on species and gender,
gibbons' fur coloration varies from dark to light brown shades, and anywhere in
between black and white. It is rare to see a completely white gibbon.
New World Monkeys
Nicknames for this monkey often refer to its diminutiveness,
as in the following two examples: mono de bolsillo ("pocket monkey") and
leoncito ("little lion").
The Pygmy Marmoset has a tawny coat, and a ringed
that can be as long as its body. In common with other callitrichids, it has claws
instead of nails on all its digits except the big toe. It is
, feeding on
, and sometimes even small
. Its small weight allows it
to reach the very highest leaves of a tree, and to exploit the otherwise little-used
food sources there. Much of its diet, however, comes from tapping
Up to two-thirds of its time is spent gouging tree
to reach the gummy sap.
The Pygmy Marmoset has specialized incisors for gouging holes in bark. Because
of its small size, and its swift movements, it is very hard to observe in the wild.