CITES Classification of the Drill:
[?]
Endangered
Drill Habitat:
Tropical rainforests of Cameroon, Nigeria, north of the
Sanaga River and the island of Bioko (equatorial Guinea)
Drill Social Structure and Behaviour:
Live in family groups of 20 or more, lead by a dominant
male who retains his position until successfully challenged.
They groom one another to reinforce group hierarchy and
to keep parasite free.
Drill Communication:
Grunt calls have been identified which are believed to
be used to keep in contact with other group members.
Drill Life Cycle:
Females reach sexual maturity at 4-5 years and males 5-7
years. Females generally give birth to a single infant.
Life span is 30 years.
Drill Diet:
Mainly frugivorous (fruit eaters) but also consuming plants,
insects and smaller animals.
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