Big Finner vs Chi-o

Balaenoptera physalus compared with Oenanthe javanica

Key Differences

• Big Finner is Endangered while Chi-o is Not Evaluated.

Taxonomic Classification

Rank	Big Finner	Chi-o
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Aves (นก)
Order	Cetacea (Whales & Dolphins)	Passeriformes (นกเกาะคอน)
Family	Balaenopteridae (Rorquals)	Muscicapidae
Genus	Balaenoptera (Rorquals)	Oenanthe
Species	Balaenoptera physalus	Oenanthe javanica

Evolutionary Relationship

Big Finner and Chi-o share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Big Finner

EN — Endangered

Chi-o

NE — Not Evaluated

Physical Characteristics

Attribute	Big Finner	Chi-o
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.

Chi-o

Habitat

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

Range

Distributed across Canada, Italy, Sweden, 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.

Shared Countries

Both species can be found in 2 countries:

🇸🇪 Sweden 🇹🇼 Taiwan