Bell's False Brook Salamander vs Big Finner

Isthmura bellii compared with Balaenoptera physalus

Key Differences

• Bell's False Brook Salamander is Least Concern while Big Finner is Endangered.

Taxonomic Classification

Rank	Bell's False Brook Salamander	Big Finner
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Amphibia (Amphibians)	Mammalia (Mammals)
Order	Caudata (Caudata)	Cetacea (Whales & Dolphins)
Family	Plethodontidae	Balaenopteridae (Rorquals)
Genus	Isthmura	Balaenoptera (Rorquals)
Species	Isthmura bellii	Balaenoptera physalus

Evolutionary Relationship

Bell's False Brook Salamander and Big Finner share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bell's False Brook Salamander

LC — Least Concern

Big Finner

EN — Endangered

Physical Characteristics

Attribute	Bell's False Brook Salamander	Big Finner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bell's False Brook Salamander

Habitat

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

Range

Found in Mexico.

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered 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.

Big Finner

Big Finner (Balaenoptera physalus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.