brown bear vs Complex-toothed Flying Squirrel

Ursus arctos compared with Trogopterus xanthipes

Key Differences

• brown bear is Extinct while Complex-toothed Flying Squirrel is Near Threatened.

Taxonomic Classification

Rank	brown bear	Complex-toothed Flying Squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Carnivora (carnívoros)	Rodentia (Roedores)
Family	Ursidae (Bears)	Sciuridae (Squirrels)
Genus	Ursus (Bears)	Trogopterus
Species	Ursus arctos	Trogopterus xanthipes

Evolutionary Relationship

brown bear and Complex-toothed Flying Squirrel share a common ancestor at the Class level: Mammalia. (mamíferos)

Conservation Status

brown bear

EX — Extinct

Population: ~200.0K

Trend: Stable →

Complex-toothed Flying Squirrel

NT — Near Threatened

Physical Characteristics

Attribute	brown bear	Complex-toothed Flying Squirrel
Diet	Omnivore	—
Average Lifespan	25 years	—
Average Length	2.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

brown bear

Habitat

Typically found in a wide range of habitat types.

Range

Found across Europe (6 countries).

Complex-toothed Flying Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

brown bear

A espécie de urso de distribuição mais ampla do mundo, os ursos-pardos ocorrem desde a América do Norte e a Europa pela Rússia até o Japão, ocupando florestas, tundra e prados alpinos. Os adultos podem pesar até 700 kg em populações costeiras do Alasca. Onívoros que consomem bagas, raízes, peixes e carniça, os ursos-pardos são uma espécie-chave que distribui nutrientes por toda a paisagem. A maioria das populações é estável, embora algumas subespécies estejam ameaçadas.

Complex-toothed Flying Squirrel

<em>Trogopterus xanthipes</em>, the complex-toothed flying squirrel, is a medium-sized gliding rodent in the family Pteromyidae endemic to China, where it inhabits montane broadleaf and mixed forests at elevations typically between 1,000 and 2,700 metres in provinces including Sichuan, Yunnan, Guizhou, Hubei, and neighbouring regions. This species is the sole member of the genus Trogopterus and is distinguished by complex tooth morphology compared to other flying squirrels. Like all flying squirrels, it possesses a patagium — a gliding membrane stretching between fore and hind limbs — that enables it to glide between trees rather than undertake powered flight. The complex-toothed flying squirrel is nocturnal and arboreal, spending its days sheltering in tree hollows and foraging at night for leaves, bark, seeds, and fungi. Its faeces, known as Wuflingzhi, have been used in traditional Chinese medicine for centuries, leading to trapping pressure in parts of its range. The IUCN classifies this species as Near Threatened, reflecting population decline driven by overhunting for medicinal use and ongoing habitat loss from logging and agricultural encroachment in montane forests. Biological traits including average body mass, lifespan, litter size, and home range are partially documented but detailed population estimates are limited. Conservation measures include legal protections under Chinese wildlife law.