Big Finner vs McDiarmid Thorius

Balaenoptera physalus compared with Thorius munificus

Key Differences

• Big Finner is Endangered while McDiarmid Thorius is Critically Endangered.

Taxonomic Classification

Rank	Big Finner	McDiarmid Thorius
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Cetacea (Whales & Dolphins)	Caudata (Caudata)
Family	Balaenopteridae (Rorquals)	Plethodontidae
Genus	Balaenoptera (Rorquals)	Thorius
Species	Balaenoptera physalus	Thorius munificus

Evolutionary Relationship

Big Finner and McDiarmid Thorius share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big Finner

EN — Endangered

McDiarmid Thorius

CR — Critically Endangered

Physical Characteristics

Attribute	Big Finner	McDiarmid Thorius
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

McDiarmid Thorius

Habitat

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

Range

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

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.