Bell's False Brook Salamander vs Oso Polar

Isthmura bellii compared with Ursus maritimus

Key Differences

• Bell's False Brook Salamander is Least Concern while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Bell's False Brook Salamander	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Amphibia (Amphibians)	Mammalia (mamíferos)
Order	Caudata (Urodela)	Carnivora (carnívoros)
Family	Plethodontidae	Ursidae (Bears)
Genus	Isthmura	Ursus (Bears)
Species	Isthmura bellii	Ursus maritimus

Evolutionary Relationship

Bell's False Brook Salamander and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Bell's False Brook Salamander

LC — Least Concern

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Bell's False Brook Salamander	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Bell's False Brook Salamander

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Mexico.

Oso Polar

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.

Bell's False Brook Salamander

The Bell's False Brook Salamander (Isthmura bellii) is a species in the genus Isthmura. It is currently classified as Least Concern on the IUCN Red List. Typically found in freshwater habitats, moist forests, and wetlands.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.