Big Finner vs Black-tailed Gull

Balaenoptera physalus compared with Larus crassirostris

Key Differences

• Big Finner is Endangered while Black-tailed Gull is Least Concern.

Taxonomic Classification

Rank	Big Finner	Black-tailed Gull
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Charadriiformes (Charadriiformes)
Family	Balaenopteridae (Rorquals)	Laridae
Genus	Balaenoptera (Rorquals)	Larus
Species	Balaenoptera physalus	Larus crassirostris

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Black-tailed Gull

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Black-tailed Gull
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.

Black-tailed Gull

Habitat

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

Range

Distributed across Norway, Taiwan, and United States.

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.

Black-tailed Gull

The Black-tailed Gull (Larus crassirostris) is a species in the genus Larus. It is currently classified as Least Concern on the IUCN Red List. Distributed across Norway, Taiwan, and United States.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇹🇼 Taiwan