Common Tern vs Hooded seal

Sterna hirundo compared with Cystophora cristata

Taxonomic Classification

Rank	Common Tern	Hooded seal
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Charadriiformes (Charadriiformes)	Pinnipedia (Seals & Sea Lions)
Family	Laridae	Phocidae (True Seals)
Genus	Sterna	Cystophora
Species	Sterna hirundo	Cystophora cristata

Evolutionary Relationship

Common Tern and Hooded seal share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Common Tern

EN — Endangered

Hooded seal

EN — Endangered

Physical Characteristics

Attribute	Common Tern	Hooded seal
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Tern

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.

Hooded seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Denmark, Norway, and Portugal. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Tern

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 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal