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Western gorillas live in both lowland swamp forests and montane forests, at elevations ranging from sea level to 1,600 m (5,200 ft). [39] Western lowland gorillas live in swamp and lowland forests ranging up to 1,600 m (5,200 ft), and Cross River gorillas live in low-lying and submontane forests ranging from 150–1,600 m (490–5,250 ft).
Gorillas construct nests for day and night use. Day nests tend to be simple aggregations of branches and leaves on the ground, while night nests are more elaborate constructions usually on the ground but sometimes on trees, especially those of juveniles and females in areas submitted to a high poaching pressure.
In the study done at Lope, gorillas harvest most of their food arboreally, but less than half of their night nests are built in trees. [14] They are often found on the ground, and the group has up to 30 gorillas. Western lowland gorillas live in the smallest family groups of all gorillas, with an average of four to eight members in each.
There has only been one albino western lowland gorilla ever found in the wild or captivity. Snowflake the gorilla lived in the Barcelona Zoo for 36 years and he was the world’s only albino gorilla.
Western gorillas are long-lived and may survive for as long as 40 years in the wild. A group's home range may be as large as 30 km 2 (12 sq mi), but is not actively defended. Wild western gorillas are known to use tools. [10] Western gorillas' diets are high in fiber, including leaves, stems, fruit, piths, flowers, bark, invertebrates, and soil.
The Umubano Family of Gorillas. Mountain gorillas live in large family groups headed up by a dominant male gorilla known as a silverback due to the saddle of silver hair on the back of some of the ...
Skeleton and stuffed of Eastern lowland gorilla at MHNLille. Eastern lowland gorillas are the largest subspecies of gorilla and the largest living primates. [8] Males weigh between 150 and 209 kilograms (331 and 461 lb) based on four males, females of 76 kilograms (168 lb) although this had a small sample size.
These features are more developed in monkeys and apes, and noticeably less so in lorises and lemurs. Some primates, including gorillas, humans and baboons, are primarily ground-dwelling rather than arboreal, but all species have adaptations for climbing trees.