Niceforo Maria’s Oldfield Mouse vs Bely Medved

Thomasomys nicefori compared with Ursus maritimus

Key Differences

• Niceforo Maria’s Oldfield Mouse is Least Concern while Bely Medved is Vulnerable.

Taxonomic Classification

Rank	Niceforo Maria’s Oldfield Mouse	Bely Medved
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Mammalia (млекопитающие)	Mammalia (млекопитающие)
Order	Rodentia (грызуны)	Carnivora (хищные)
Family	Cricetidae	Ursidae (Bears)
Genus	Thomasomys	Ursus (Bears)
Species	Thomasomys nicefori	Ursus maritimus

Evolutionary Relationship

Niceforo Maria’s Oldfield Mouse and Bely Medved share a common ancestor at the Class level: Mammalia. (млекопитающие)

Conservation Status

Niceforo Maria’s Oldfield Mouse

LC — Least Concern

Bely Medved

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Niceforo Maria’s Oldfield Mouse	Bely Medved
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Niceforo Maria’s Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Bely Medved

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bely Medved

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.