Big Finner vs Chestnut-collared Swallow

Balaenoptera physalus compared with Petrochelidon rufocollaris

Key Differences

• Big Finner is Endangered while Chestnut-collared Swallow is Least Concern.

Taxonomic Classification

Rank	Big Finner	Chestnut-collared Swallow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Cetacea (Whales & Dolphins)	Passeriformes (Songbirds)
Family	Balaenopteridae (Rorquals)	Hirundinidae
Genus	Balaenoptera (Rorquals)	Petrochelidon
Species	Balaenoptera physalus	Petrochelidon rufocollaris

Evolutionary Relationship

Big Finner and Chestnut-collared Swallow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Big Finner

EN — Endangered

Chestnut-collared Swallow

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Chestnut-collared Swallow
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.

Chestnut-collared Swallow

Habitat

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

Range

Distributed across Ecuador and Norway.

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.

Chestnut-collared Swallow

The Chestnut-collared Swallow (Petrochelidon rufocollaris) is a species in the genus Petrochelidon. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

Shared Countries

Both species can be found in 2 countries:

🇪🇨 Ecuador 🇳🇴 Norway