trinta-réis-boreal / gaivina vs Inornate Squirrel

Sterna hirundo compared with Callosciurus inornatus

Key Differences

• trinta-réis-boreal / gaivina is Endangered while Inornate Squirrel is Least Concern.

Taxonomic Classification

Rank	trinta-réis-boreal / gaivina	Inornate Squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Aves (ave)	Mammalia (mamíferos)
Order	Charadriiformes (Charadriiformes)	Rodentia (Roedores)
Family	Laridae	Sciuridae (Squirrels)
Genus	Sterna	Callosciurus
Species	Sterna hirundo	Callosciurus inornatus

Evolutionary Relationship

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

Conservation Status

trinta-réis-boreal / gaivina

EN — Endangered

Inornate Squirrel

LC — Least Concern

Physical Characteristics

Attribute	trinta-réis-boreal / gaivina	Inornate Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Inornate Squirrel

Habitat

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.