Orang-Utan vs Westlicher Gorilla

Pongo pygmaeus compared with Gorilla gorilla

Key Differences

• Orang-Utan is omnivore while Westlicher Gorilla is herbivore.
• Westlicher Gorilla is 2.1x heavier than Orang-Utan.
• Westlicher Gorilla lives longer (40 years vs 35 years).

Taxonomic Classification

Rank	Orang-Utan	Westlicher Gorilla
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order same	Primates (Primaten)	Primates (Primaten)
Family same	Hominidae (Great Apes)	Hominidae (Great Apes)
Genus	Pongo (Orangutans)	Gorilla (Gorillas)
Species	Pongo pygmaeus	Gorilla gorilla

Evolutionary Relationship

Orang-Utan and Westlicher Gorilla share a common ancestor at the Family level: Hominidae. (Great Apes)

Conservation Status

Orang-Utan

CR — Critically Endangered

Population: ~104.7K

Trend: Decreasing ↓

Westlicher Gorilla

CR — Critically Endangered

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Orang-Utan	Westlicher Gorilla
Diet	Omnivore	Herbivore
Average Lifespan	35 years	40 years
Average Length	1.4 m	1.7 m
Average Weight	75.0 kg	160.0 kg

Habitat & Geographic Range

Orang-Utan

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 5 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Indonesia and Malaysia. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Westlicher Gorilla

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 4 distinct biome types within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Cameroon, Congo (Republic), Equatorial Guinea, and Gabon. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Orang-Utan

The world's largest arboreal mammal, Bornean orangutans weigh up to 90 kg and spend most of their lives in the rainforest canopy of Borneo. Solitary and semi-nomadic, they build nightly sleeping nests in trees and forage for fruit, leaves, and invertebrates. Critically Endangered, with populations having declined by over 50% in the past 60 years due to deforestation from palm oil expansion and illegal hunting.

Westlicher Gorilla

The world's largest primate, western gorillas weigh up to 180 kg and inhabit the tropical and subtropical forests of equatorial Africa. Primarily herbivorous, living in family groups led by a silverback male who protects the troop and mediates social conflicts. Critically Endangered, with populations threatened by deforestation, poaching for bushmeat, and outbreaks of Ebola virus disease.