Blind Small-eared Shrew vs Brown Rat

Cryptotis niausa compared with Rattus norvegicus

Key Differences

• Blind Small-eared Shrew is Data Deficient while Brown Rat is Least Concern.

Taxonomic Classification

Rank	Blind Small-eared Shrew	Brown Rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Soricomorpha (Soricomorpha)	Rodentia (Rodents)
Family	Soricidae	Muridae (Mice & Rats)
Genus	Cryptotis	Rattus
Species	Cryptotis niausa	Rattus norvegicus

Evolutionary Relationship

Blind Small-eared Shrew and Brown Rat share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Blind Small-eared Shrew

DD — Data Deficient

Brown Rat

LC — Least Concern

Physical Characteristics

Attribute	Blind Small-eared Shrew	Brown Rat
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.

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

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.

Brown Rat

Brown Rat (Rattus norvegicus) 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.

Shared Countries

Both species can be found in 2 countries:

🇨🇴 Colombia 🇪🇨 Ecuador