Leatherback Sea Turtle vs Lesser Crested Tern

Dermochelys coriacea compared with Thalasseus bengalensis

Key Differences

• Leatherback Sea Turtle is Vulnerable while Lesser Crested Tern is Not Evaluated.

Taxonomic Classification

Rank	Leatherback Sea Turtle	Lesser Crested Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Reptilia (Reptiles)	Aves (Birds)
Order	Testudines (Turtles & Tortoises)	Charadriiformes (Charadriiformes)
Family	Cheloniidae (Sea Turtles)	Laridae
Genus	Chelonia (Green Sea Turtles)	Thalasseus
Species	Dermochelys coriacea	Thalasseus bengalensis

Evolutionary Relationship

Leatherback Sea Turtle and Lesser Crested Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Lesser Crested Tern

NE — Not Evaluated

Physical Characteristics

Attribute	Leatherback Sea Turtle	Lesser Crested Tern
Diet	Carnivore	—
Average Lifespan	50 years	—
Average Length	2.0 m	—
Average Weight	500.0 kg	—

Habitat & Geographic Range

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.

Lesser Crested Tern

Habitat

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

Range

Distributed across Norway and Sweden.

Leatherback Sea Turtle

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