Comadreja Orejas Negras vs Cochabamba Akodont

Didelphis aurita compared with Akodon siberiae

Key Differences

• Comadreja Orejas Negras is Least Concern while Cochabamba Akodont is Near Threatened.

Taxonomic Classification

Rank	Comadreja Orejas Negras	Cochabamba Akodont
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Didelphimorphia (Didelphimorphia)	Rodentia (Rodents)
Family	Didelphidae	Cricetidae
Genus	Didelphis	Akodon
Species	Didelphis aurita	Akodon siberiae

Evolutionary Relationship

Comadreja Orejas Negras and Cochabamba Akodont share a common ancestor at the Class level: Mammalia. (mamíferos)

Conservation Status

Comadreja Orejas Negras

LC — Least Concern

Cochabamba Akodont

NT — Near Threatened

Physical Characteristics

Attribute	Comadreja Orejas Negras	Cochabamba Akodont
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Comadreja Orejas Negras

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Cochabamba Akodont

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Comadreja Orejas Negras

The Big-eared opossum (Didelphis aurita) is a species in the genus Didelphis. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Cochabamba Akodont

The Cochabamba akodont (Akodon siberiae) is a small South American rodent endemic to the Cochabamba department of Bolivia. A member of the speciose genus Akodon — the so-called grass mice — this species inhabits humid montane grasslands and shrublands in the Andes, typically at elevations between 2,500 and 3,800 metres. Like other akodont rodents, it is primarily granivorous and insectivorous, foraging among dense grass tussocks and low vegetation for seeds, invertebrates, and plant material. The species is fossorial to a degree, constructing runways and shallow burrows beneath grass cover that provide shelter from predators including raptors and small carnivores. Akodon siberiae was described relatively recently from specimens collected in the Cochabamba region and remains poorly known; much of its ecology and reproductive biology has been inferred from better-studied congeners. Population size estimates are unavailable, though the IUCN classifies it as Near Threatened due to its restricted range and ongoing habitat conversion driven by agricultural expansion, livestock grazing, and burning of Andean grasslands. The species may have some tolerance for modified habitats but its dependence on intact puna and montane scrub makes it vulnerable to continued land-use change. Conservation measures such as protection of remnant native grassland within its limited range are considered important for its long-term persistence.