CITES Classification of the Drill:
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.
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.
Mainly frugivorous (fruit eaters) but also consuming plants,
insects and smaller animals.
Visit our Top
25 Most Endangered Primates List to find out
which primates are considered critically endangered
by the IUCN.
Help Save The Primates improve quality of life for
Save The Primates encourages action - become a volunteer.
If you are interested in hands-on volunteering for the
welfare of primates,
whether chimpanzees, apes, gorillas, or Drill, visit our
PASA Sancturies page
for organisations that accept volunteers.