Central Andes Oldfield Mouse vs Cobb's Wren

Thomasomys contradictus compared with Troglodytes cobbi

Key Differences

• Central Andes Oldfield Mouse is Data Deficient while Cobb's Wren is Least Concern.

Taxonomic Classification

Rank	Central Andes Oldfield Mouse	Cobb's Wren
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Passeriformes (Songbirds)
Family	Cricetidae	Troglodytidae
Genus	Thomasomys	Troglodytes
Species	Thomasomys contradictus	Troglodytes cobbi

Evolutionary Relationship

Central Andes Oldfield Mouse and Cobb's Wren share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Central Andes Oldfield Mouse

DD — Data Deficient

Cobb's Wren

LC — Least Concern

Physical Characteristics

Attribute	Central Andes Oldfield Mouse	Cobb's Wren
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Central Andes Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Cobb's Wren

Habitat

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

Range

Found in Norway.

Central Andes Oldfield Mouse

The Central Andes Oldfield Mouse (Thomasomys contradictus) is a species in the genus Thomasomys. It is currently classified as Data Deficient on the IUCN Red List. Found in Colombia.

Cobb's Wren

Cobb's wren (Troglodytes cobbi) is a small, insectivorous passerine in the family Troglodytidae, endemic to the Falkland Islands (Islas Malvinas) in the South Atlantic Ocean. It inhabits rocky coastal areas, kelp beds, tussac grass tussocks, and rocky shorelines, where it forages actively for invertebrates, amphipods, and small crustaceans among rocks and beach wrack. Cobb's wren is closely related to the house wren complex but represents a distinct island lineage adapted to maritime conditions. Its distribution is restricted to the outer islands of the Falklands, as introduced rats and cats have extirpated it from most inhabited islands and the two main islands where introduced predators are present. On rat-free outer islands, populations are locally common. The IUCN assesses Cobb's wren as Least Concern overall, acknowledging that total population size across the outer islands is considered adequate, though its restricted island endemic range and vulnerability to mammalian predator introduction demand ongoing management. Rat eradication programmes on Falkland Islands have been crucial in protecting this and other seabird-associated species.