Big Finner vs Harmless Serotine

Balaenoptera physalus compared with Eptesicus innoxius

Key Differences

• Big Finner is Endangered while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	Big Finner	Harmless Serotine
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class same	Mammalia (млекопитающие)	Mammalia (млекопитающие)
Order	Cetacea (Whales & Dolphins)	Chiroptera (рукокрылые)
Family	Balaenopteridae (Rorquals)	Vespertilionidae
Genus	Balaenoptera (Rorquals)	Eptesicus
Species	Balaenoptera physalus	Eptesicus innoxius

Evolutionary Relationship

Big Finner and Harmless Serotine share a common ancestor at the Class level: Mammalia. (млекопитающие)

Conservation Status

Big Finner

EN — Endangered

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	Big Finner	Harmless Serotine
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.

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Shared Countries

Both species can be found in 1 countries:

🇪🇨 Ecuador