Bermuda Saw-whet Owl vs Colombian Oldfield Mouse

Aegolius gradyi compared with Thomasomys dispar

Key Differences

• Bermuda Saw-whet Owl is Extinct while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Bermuda Saw-whet Owl	Colombian Oldfield Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Strigiformes (Owls)	Rodentia (Rodents)
Family	Strigidae (True Owls)	Cricetidae
Genus	Aegolius	Thomasomys
Species	Aegolius gradyi	Thomasomys dispar

Evolutionary Relationship

Bermuda Saw-whet Owl and Colombian Oldfield Mouse share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bermuda Saw-whet Owl

EX — Extinct

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Bermuda Saw-whet Owl	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bermuda Saw-whet Owl

Habitat

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

Range

Found in Norway.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Bermuda Saw-whet Owl

The Bermuda Saw-whet Owl (Aegolius gradyi) is a species in the genus Aegolius. It is currently classified as Extinct on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

Colombian Oldfield Mouse

<em>Thomasomys dispar</em>, commonly known as the Colombian Oldfield Mouse, is a small rodent species belonging to the genus <em>Thomasomys</em> within the family Cricetidae. This species is classified as Data Deficient, indicating that insufficient information is currently available to evaluate its conservation status with confidence. It has been documented in Colombia, where it inhabits diverse terrestrial and aquatic-adjacent environments. Members of the genus <em>Thomasomys</em> are typically associated with high-altitude Andean habitats, including páramo grasslands, shrublands, and montane forest edges, where they occupy ground-level microhabitats and burrow in soft soils. These mice are generally omnivorous, consuming seeds, plant material, and invertebrates, though specific dietary data for <em>Thomasomys dispar</em> have not been recorded. Biological traits of this species remain poorly documented in the scientific literature. The Data Deficient classification highlights the need for targeted surveys in Colombian Andean regions to determine population size, distribution, and the ecological requirements of this poorly known rodent.