Caatinga laucha vs trinta-réis-boreal / gaivina

Calomys expulsus compared with Sterna hirundo

Key Differences

• Caatinga laucha is Least Concern while trinta-réis-boreal / gaivina is Endangered.

Taxonomic Classification

Rank	Caatinga laucha	trinta-réis-boreal / gaivina
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Mammalia (mamíferos)	Aves (ave)
Order	Rodentia (Roedores)	Charadriiformes (Charadriiformes)
Family	Cricetidae	Laridae
Genus	Calomys	Sterna
Species	Calomys expulsus	Sterna hirundo

Evolutionary Relationship

Caatinga laucha and trinta-réis-boreal / gaivina share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Caatinga laucha

LC — Least Concern

trinta-réis-boreal / gaivina

EN — Endangered

Physical Characteristics

Attribute	Caatinga laucha	trinta-réis-boreal / gaivina
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Caatinga laucha

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

trinta-réis-boreal / gaivina

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 9 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (7 countries), North America (United States), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered 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.

trinta-réis-boreal / gaivina

O trinta-réis-comum (Sterna hirundo) está classificado como Em Perigo (EN) na Lista Vermelha da IUCN. Em alto risco de extinção na natureza, com declínio populacional significativo e ameaças contínuas à sobrevivência.