trinta-réis-boreal / gaivina vs Eurasian red squirrel

Sterna hirundo compared with Sciurus vulgaris

Key Differences

• trinta-réis-boreal / gaivina is Endangered while Eurasian red squirrel is Least Concern.

Taxonomic Classification

Rank	trinta-réis-boreal / gaivina	Eurasian red 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	Sciurus (Tree Squirrels)
Species	Sterna hirundo	Sciurus vulgaris

Evolutionary Relationship

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

Conservation Status

trinta-réis-boreal / gaivina

EN — Endangered

Eurasian red squirrel

LC — Least Concern

Physical Characteristics

Attribute	trinta-réis-boreal / gaivina	Eurasian red 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.

Eurasian red squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Asia (Georgia) and Europe (5 countries).

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.

Eurasian red squirrel

O esquilo-vermelho-euroasiático (Sciurus vulgaris) está classificado como Pouco Preocupante (LC) na Lista Vermelha da UICN. Amplamente distribuído e abundante em sua área de ocorrência, com populações estáveis e sem preocupações imediatas de conservação.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇷🇺 Russia 🇸🇪 Sweden