Four-toed Hedgehog vs River Tern

Atelerix albiventris compared with Sterna aurantia

Key Differences

• Four-toed Hedgehog is Least Concern while River Tern is Vulnerable.

Taxonomic Classification

Rank	Four-toed Hedgehog	River Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Erinaceomorpha (Erinaceomorpha)	Charadriiformes (Charadriiformes)
Family	Erinaceidae	Laridae
Genus	Atelerix	Sterna
Species	Atelerix albiventris	Sterna aurantia

Evolutionary Relationship

Four-toed Hedgehog and River Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Four-toed Hedgehog

LC — Least Concern

River Tern

VU — Vulnerable

Physical Characteristics

Attribute	Four-toed Hedgehog	River Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Four-toed Hedgehog

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Ecuador and Spain.

River Tern

Habitat

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

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.