Big Finner vs Chatham shag

Balaenoptera physalus compared with Leucocarbo onslowi

Key Differences

• Big Finner is Endangered while Chatham shag is Critically Endangered.

Taxonomic Classification

Rank	Big Finner	Chatham shag
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Suliformes (Suliformes)
Family	Balaenopteridae (Rorquals)	Phalacrocoracidae
Genus	Balaenoptera (Rorquals)	Leucocarbo
Species	Balaenoptera physalus	Leucocarbo onslowi

Evolutionary Relationship

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

Conservation Status

Big Finner

EN — Endangered

Chatham shag

CR — Critically Endangered

Physical Characteristics

Attribute	Big Finner	Chatham shag
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.

Chatham shag

Habitat

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

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.

Chatham shag

The Chatham shag (Leucocarbo onslowi) is a species in the genus Leucocarbo. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.