Big Finner vs Narrow-tailed Emerald

Balaenoptera physalus compared with Chlorostilbon stenurus

Key Differences

• Big Finner is Endangered while Narrow-tailed Emerald is Least Concern.

Taxonomic Classification

Rank	Big Finner	Narrow-tailed Emerald
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Apodiformes (Apodiformes)
Family	Balaenopteridae (Rorquals)	Trochilidae
Genus	Balaenoptera (Rorquals)	Chlorostilbon
Species	Balaenoptera physalus	Chlorostilbon stenurus

Evolutionary Relationship

Big Finner and Narrow-tailed Emerald share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big Finner

EN — Endangered

Narrow-tailed Emerald

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Narrow-tailed Emerald
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.

Narrow-tailed Emerald

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Norway, 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.

Shared Countries

Both species can be found in 3 countries:

🇨🇴 Colombia 🇳🇴 Norway 🇻🇪 Venezuela