Biology
A dominant male leads a multi-male multi-female group of 20-30, and is father to most of the young. This group may join others, forming super groups of over 100 individuals. They are seminomadic seasonally, and will often rub their chests onto trees to mark their territory. They are semiterrestrial, foraging mainly on the ground, but climbing trees to sleep at night. The females give birth to a single baby; twins have been recorded once at the Drill Rehab & Breeding Center in Nigeria www.pandrillus.org.
Longevity is up to 28 years.
The diet is primarily frugivorous, taking a wide range of fruit, but they also eat herbs, roots, eggs, insects, and small mammals on occasion.
Read more about this topic: Drill (mammal)
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