Black-eared Red-backed Vole vs Grasshopper Sparrow

Eothenomys olitor compared with Ammodramus savannarum

Key Differences

• Black-eared Red-backed Vole is Least Concern while Grasshopper Sparrow is Critically Endangered.

Taxonomic Classification

Rank	Black-eared Red-backed Vole	Grasshopper Sparrow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Passeriformes (Songbirds)
Family	Cricetidae	Passerellidae
Genus	Eothenomys	Ammodramus
Species	Eothenomys olitor	Ammodramus savannarum

Evolutionary Relationship

Black-eared Red-backed Vole and Grasshopper Sparrow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-eared Red-backed Vole

LC — Least Concern

Grasshopper Sparrow

CR — Critically Endangered

Physical Characteristics

Attribute	Black-eared Red-backed Vole	Grasshopper Sparrow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-eared Red-backed Vole

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Grasshopper Sparrow

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 5 distinct biome types spanning the Neotropic and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Colombia, Ecuador, Norway, and United States. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-eared Red-backed Vole

The Black-eared Red-backed Vole (Eothenomys olitor) is a species in the genus Eothenomys. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.