Cofre de Perote Salamander vs Polar bear

Isthmura naucampatepetl compared with Ursus maritimus

Key Differences

• Cofre de Perote Salamander is Critically Endangered while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Cofre de Perote Salamander	Polar bear
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class	Amphibia (两栖动物)	Mammalia (哺乳動物)
Order	Caudata (有尾目)	Carnivora (食肉目)
Family	Plethodontidae	Ursidae (Bears)
Genus	Isthmura	Ursus (Bears)
Species	Isthmura naucampatepetl	Ursus maritimus

Evolutionary Relationship

Cofre de Perote Salamander and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

Cofre de Perote Salamander

CR — Critically Endangered

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Cofre de Perote Salamander	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Cofre de Perote Salamander

Habitat

Found across multiple habitat types including tropical and subtropical coniferous forests, tropical and subtropical grasslands and savannas, and Mediterranean forests and woodlands, among 6 distinct biome types spanning the Nearctic and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

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

Polar bear

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.

Cofre de Perote Salamander

The Cofre de Perote Salamander (Isthmura naucampatepetl) is a critically endangered lungless salamander in the family Plethodontidae, known only from a single extinct volcanic peak—Cofre de Perote (Nauhcampatépetl) in the Mexican state of Veracruz. As a plethodontid, it relies entirely on cutaneous respiration through its moist skin, making it acutely dependent on cool, humid montane cloud forest conditions at high elevations. The species is associated with the pine-oak and cloud forest zones near the summit of Cofre de Perote, an isolated habitat island rising above the surrounding lowlands of Veracruz state. Such extreme topographic restriction means the entire species occupies an area of a few square kilometres, making it one of the most geographically limited vertebrates in North America. It is classified as Critically Endangered by the IUCN due to its extremely small and severely fragmented range, ongoing habitat degradation from agricultural encroachment, logging, and reforestation with non-native pine species, and the probable future impacts of climate change on cloud forest at high elevation. Population size estimates are very uncertain, but field surveys have found the species to be extremely rare. No captive breeding programmes are currently known to exist for this taxon.

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。