Blind Small-eared Shrew vs Common Tern

Cryptotis niausa compared with Sterna hirundo

Key Differences

• Blind Small-eared Shrew is Data Deficient while Common Tern is Endangered.

Taxonomic Classification

Rank	Blind Small-eared Shrew	Common Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Soricomorpha (Soricomorpha)	Charadriiformes (Charadriiformes)
Family	Soricidae	Laridae
Genus	Cryptotis	Sterna
Species	Cryptotis niausa	Sterna hirundo

Evolutionary Relationship

Blind Small-eared Shrew and Common Tern share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Blind Small-eared Shrew

DD — Data Deficient

Common Tern

EN — Endangered

Physical Characteristics

Attribute	Blind Small-eared Shrew	Common Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blind Small-eared Shrew

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Ecuador.

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.

Blind Small-eared Shrew

The Blind Small-eared Shrew (Cryptotis niausa) is a species in the genus Cryptotis. It is currently classified as Data Deficient on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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 2 countries:

🇨🇴 Colombia 🇪🇨 Ecuador