Big Finner vs Big Naked-backed Bat

Balaenoptera physalus compared with Pteronotus gymnonotus

Key Differences

• Big Finner is Endangered while Big Naked-backed Bat is Least Concern.

Taxonomic Classification

Rank	Big Finner	Big Naked-backed Bat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Cetacea (Whales & Dolphins)	Chiroptera (Bats)
Family	Balaenopteridae (Rorquals)	Mormoopidae
Genus	Balaenoptera (Rorquals)	Pteronotus
Species	Balaenoptera physalus	Pteronotus gymnonotus

Evolutionary Relationship

Big Finner and Big Naked-backed Bat share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Big Finner

EN — Endangered

Big Naked-backed Bat

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Big Naked-backed Bat
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.

Big Naked-backed Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

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.

Big Naked-backed Bat

The Big Naked-backed Bat (Pteronotus gymnonotus) is a species in the genus Pteronotus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Shared Countries

Both species can be found in 2 countries:

🇨🇴 Colombia 🇻🇪 Venezuela