|Spider Monkey study.
27x37cm Coloured charcoal engraving, and drawing on board
Spider monkeys live in medium-sized, loosely associated groups of about 30 individuals. The females have a more active leading role than males, so their social system is thought to be matriarchal. Within the group, adult males can coexist peacefully, although there is a clear hierarchy determined by age. The group is centered on the females and their young. Males are dominant over females but it is the females that make the key decisions for the group. Spider monkeys eat mostly fruit and enjoy eating the soft centres of ripe fruits and also seeds etc. A very small part of the diet consists of insects, insect larvae and birds' eggs. When feeding, they may hang by their tails and reach out for tidbits with their hands.