Commerson-Delfin vs Javareisfink

Cephalorhynchus commersonii compared with Lonchura oryzivora

Key Differences

• Commerson-Delfin is Least Concern while Javareisfink is Vulnerable.

Taxonomic Classification

Rank	Commerson-Delfin	Javareisfink
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Mammalia (Säugetiere)	Aves (Vögel)
Order	Cetacea (Whales & Dolphins)	Passeriformes (Sperlingsvögel)
Family	Delphinidae (Oceanic Dolphins)	Estrildidae
Genus	Cephalorhynchus	Lonchura
Species	Cephalorhynchus commersonii	Lonchura oryzivora

Evolutionary Relationship

Commerson-Delfin and Javareisfink share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Commerson-Delfin

LC — Least Concern

Javareisfink

VU — Vulnerable

Physical Characteristics

Attribute	Commerson-Delfin	Javareisfink
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Commerson-Delfin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Javareisfink

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 6 distinct biome types spanning the Afrotropic and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Tanzania), Asia (Taiwan, Thailand, Vietnam), Europe (5 countries), North America (United States), Oceania and the Pacific (Australia), and South America (Colombia, Venezuela). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Commerson-Delfin

<em>Cephalorhynchus commersonii</em>, commonly known as Commerson's Dolphin, is a small cetacean in the family Delphinidae. This species is classified as Least Concern on the IUCN Red List and is notable for its striking black-and-white coloration, which makes it one of the most visually distinctive dolphin species. Commerson's Dolphins typically inhabit coastal and nearshore marine environments of the Southern Hemisphere, particularly around the Falkland Islands, the southern tip of South America, and a geographically isolated population near the Kerguelen Islands in the Indian Ocean. These dolphins are highly social animals, often observed in small groups engaging in acrobatic behaviors near the surface. They typically feed on fish, squid, and crustaceans, often hunting cooperatively in shallow waters and kelp beds. Their average lifespan is approximately 18 years, and they are known for their fast, energetic swimming. Commerson's Dolphins are sometimes caught as bycatch in fishing nets, posing a localized conservation concern despite their overall Least Concern status.

Javareisfink

One of the most popular cage birds in East Asia, Java sparrows are striking finches with grey plumage, a bold black head, distinctive white cheek patches, and a bright red bill. Native to Java and Bali in Indonesia, they have been introduced to many parts of Asia, Africa, and the Americas. They inhabit open grasslands, rice fields, and farmland, often becoming pests on rice crops. Listed as Vulnerable in their native range due to severe trapping pressure for the cage bird trade.