Caatinga laucha vs River Tern

Calomys expulsus compared with Sterna aurantia

Key Differences

• Caatinga laucha is Least Concern while River Tern is Vulnerable.

Taxonomic Classification

Rank	Caatinga laucha	River Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Charadriiformes (Charadriiformes)
Family	Cricetidae	Laridae
Genus	Calomys	Sterna
Species	Calomys expulsus	Sterna aurantia

Evolutionary Relationship

Caatinga laucha and River Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Caatinga laucha

LC — Least Concern

River Tern

VU — Vulnerable

Physical Characteristics

Attribute	Caatinga laucha	River Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Caatinga laucha

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Caatinga laucha

The Caatinga laucha (Calomys expulsus) is a species in the genus Calomys. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.