Central Andes Oldfield Mouse vs Common Least Skipper

Thomasomys contradictus compared with Ancyloxypha numitor

Key Differences

• Central Andes Oldfield Mouse is Data Deficient while Common Least Skipper is Least Concern.

Taxonomic Classification

Rank	Central Andes Oldfield Mouse	Common Least Skipper
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Chordata (Chordatiere)	Arthropoda (Gliederfüßer)
Class	Mammalia (Säugetiere)	Insecta (Insekten)
Order	Rodentia (Nagetiere)	Lepidoptera (Schmetterlinge)
Family	Cricetidae	Hesperiidae
Genus	Thomasomys	Ancyloxypha
Species	Thomasomys contradictus	Ancyloxypha numitor

Evolutionary Relationship

Central Andes Oldfield Mouse and Common Least Skipper share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Central Andes Oldfield Mouse

DD — Data Deficient

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	Central Andes Oldfield Mouse	Common Least Skipper
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.

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

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.

Common Least Skipper

The Common Least Skipper (<em>Ancyloxypha numitor</em>) is a small butterfly in the family Hesperiidae, classified as Least Concern on the IUCN Red List. It is native to Canada and the United States, where it typically inhabits virtually all terrestrial and freshwater habitats within its range, showing a particular affinity for moist, grassy areas near water. The species is among the smallest skippers in North America, characterized by orange and brown wing coloration and a rapid, low-flying flight pattern close to vegetation. Adults typically nectar on small flowers while larvae feed on grasses, particularly those in wet meadows, marshes, stream margins, and disturbed grassy areas. The Common Least Skipper is frequently observed in wetland margins, wet prairies, and roadsides with rank grass growth. Its wide distribution across North America and habitat generalism across moist grassland and wetland types support its stable population and Least Concern conservation status. Biological traits of this species remain poorly documented in the scientific literature.