Black-faced Ibis vs blue whale

Theristicus melanopis compared with Balaenoptera musculus

Key Differences

• Black-faced Ibis is Least Concern while blue whale is Vulnerable.

Taxonomic Classification

Rank	Black-faced Ibis	blue whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Pelecaniformes (Pelecaniformes)	Cetacea (Whales & Dolphins)
Family	Threskiornithidae	Balaenopteridae (Rorquals)
Genus	Theristicus	Balaenoptera (Rorquals)
Species	Theristicus melanopis	Balaenoptera musculus

Evolutionary Relationship

Black-faced Ibis and blue whale share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-faced Ibis

LC — Least Concern

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	Black-faced Ibis	blue whale
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

Black-faced Ibis

Habitat

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

Range

Distributed across Belgium, Ecuador, and Norway.

blue whale

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-faced Ibis

The Black-faced Ibis (Theristicus melanopis) is a species in the genus Theristicus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments. Distributed across Belgium, Ecuador, and Norway.

blue whale

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.

Shared Countries

Both species can be found in 2 countries:

🇪🇨 Ecuador 🇳🇴 Norway