trinta-réis-boreal / gaivina vs small tortoiseshell

Sterna hirundo compared with Aglais urticae

Key Differences

• trinta-réis-boreal / gaivina is Endangered while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	trinta-réis-boreal / gaivina	small tortoiseshell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (cordados)	Arthropoda (artrópode)
Class	Aves (ave)	Insecta (inseto)
Order	Charadriiformes (Charadriiformes)	Lepidoptera (Butterflies & Moths)
Family	Laridae	Nymphalidae (Brush-footed Butterflies)
Genus	Sterna	Aglais
Species	Sterna hirundo	Aglais urticae

Evolutionary Relationship

trinta-réis-boreal / gaivina and small tortoiseshell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

trinta-réis-boreal / gaivina

EN — Endangered

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	trinta-réis-boreal / gaivina	small tortoiseshell
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.

small tortoiseshell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (41 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

small tortoiseshell

A borboleta-urtiga-pequena (Aglais urticae) esta classificada como Quase Ameacada (NT) na Lista Vermelha da UICN. Proxima de se qualificar como ameacada, com populacoes que podem se tornar vulneraveis sem acoes de conservacao.

Shared Countries

Both species can be found in 7 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇱🇺 Luxembourg 🇳🇴 Norway 🇵🇹 Portugal 🇷🇺 Russia 🇸🇪 Sweden