Brown-headed Gull vs Leatherback Sea Turtle

Chroicocephalus brunnicephalus compared with Dermochelys coriacea

Key Differences

• Brown-headed Gull is Not Evaluated while Leatherback Sea Turtle is Vulnerable.

Taxonomic Classification

Rank	Brown-headed Gull	Leatherback Sea Turtle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Reptilia (Reptiles)
Order	Charadriiformes (Charadriiformes)	Testudines (Turtles & Tortoises)
Family	Laridae	Cheloniidae (Sea Turtles)
Genus	Chroicocephalus	Chelonia (Green Sea Turtles)
Species	Chroicocephalus brunnicephalus	Dermochelys coriacea

Evolutionary Relationship

Brown-headed Gull and Leatherback Sea Turtle share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown-headed Gull

NE — Not Evaluated

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brown-headed Gull	Leatherback Sea Turtle
Diet	—	Carnivore
Average Lifespan	—	50 years
Average Length	—	2.0 m
Average Weight	—	500.0 kg

Habitat & Geographic Range

Brown-headed Gull

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Norway and Taiwan.

Leatherback Sea Turtle

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 and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Brown-headed Gull

The Brown-headed Gull (Chroicocephalus brunnicephalus) is a species in the genus Chroicocephalus. Typically found in various aerial, terrestrial, and aquatic environments. Distributed across Norway and Taiwan.

Leatherback Sea Turtle

The leatherback is the largest living turtle and the fourth-heaviest reptile. Unlike other turtles, it has a soft, leathery shell.