Authors:

Adult gorillas will fight to the death defending their families. This is why poachers who may be seeking only one infant for the zoo trade must often kill all the adults in the family to capture the baby.

Sy Montgomery (2009). “Walking with the Great Apes: Jane Goodall, Dian Fossey, Biruté Galdikas”, p.42, Chelsea Green Publishing
Adult gorillas will fight to the death defending their families. This is why poachers who may be seeking only one infant for the zoo trade must often kill all the adults in the family to capture the baby.