Полярная крачка vs Речная крачка

Sterna paradisaea compared with Sterna hirundo

Key Differences

• Полярная крачка is Least Concern while Речная крачка is Endangered.

Taxonomic Classification

Rank	Полярная крачка	Речная крачка
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Aves (птицы)	Aves (птицы)
Order same	Charadriiformes (ржанкообразные)	Charadriiformes (ржанкообразные)
Family same	Laridae	Laridae
Genus same	Sterna	Sterna
Species	Sterna paradisaea	Sterna hirundo

Evolutionary Relationship

Полярная крачка and Речная крачка share a common ancestor at the Genus level: Sterna.

Conservation Status

Полярная крачка

LC — Least Concern

Речная крачка

EN — Endangered

Physical Characteristics

Attribute	Полярная крачка	Речная крачка
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Полярная крачка

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Colombia, Ecuador).

Речная крачка

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.

Полярная крачка

Arctic Tern (Sterna paradisaea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Речная крачка

Common Tern (Sterna hirundo) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 7 countries:

🇧🇪 Belgium 🇨🇴 Colombia 🇩🇰 Denmark 🇪🇨 Ecuador 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States