Bermuda Saw-whet Owl vs Common Tern

Aegolius gradyi compared with Sterna hirundo

Key Differences

• Bermuda Saw-whet Owl is Extinct while Common Tern is Endangered.

Taxonomic Classification

Rank	Bermuda Saw-whet Owl	Common Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Strigiformes (Owls)	Charadriiformes (Charadriiformes)
Family	Strigidae (True Owls)	Laridae
Genus	Aegolius	Sterna
Species	Aegolius gradyi	Sterna hirundo

Evolutionary Relationship

Bermuda Saw-whet Owl and Common Tern share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Bermuda Saw-whet Owl

EX — Extinct

Common Tern

EN — Endangered

Physical Characteristics

Attribute	Bermuda Saw-whet Owl	Common Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bermuda Saw-whet Owl

Habitat

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

Range

Found in Norway.

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.

Bermuda Saw-whet Owl

The Bermuda Saw-whet Owl (Aegolius gradyi) is a species in the genus Aegolius. It is currently classified as Extinct on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

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 1 countries:

🇳🇴 Norway