The Western Lowland Gorilla (Gorilla gorilla gorilla) is a subspecies of the Western Gorilla (Gorilla gorilla) that lives in montane, primary, and secondary forests and lowland swamps in Angola, Cameroon, Central African Republic, Congo, Democratic Republic of the Congo, Equatorial Guinea and Gabon. It is the gorilla usually found in zoos. Adult male Gorillas are prone to cardiomyopathy, a degenerative heart disease. Babec, a Western Lowland Gorilla on exhibit at the Birmingham Zoo in Birmingham, Alabama (USA) was the first gorilla to receive an artificial pacemaker.
A male Western Lowland Gorilla can stand tall and weigh almost .
The Western Lowland Gorilla eats plants (including bamboo) and occasionally insects.
They live in family groupings of one dominant male, five to seven adult females, children and adolescents, and possibly a few non-dominant males. Gorillas reproduce slowly because females do not begin reproducing until the age of nine or ten and only produce one baby approximately every five years.
In the 1980s, a census taken of the gorilla populations in equatorial Africa was thought to be 100,000. Researchers adjusted the figure after years of poaching and deforestation had reduced the population to approximately 50,000.
Surveys conducted by the Wildlife Conservation Society in 2006 and 2007 found more than 100,000 previously unreported gorillas have been living in the swamp forests of Lake Tele Community Reserve and in neighbouring Marantaceae (dryland) forests in the Republic of the Congo.