Hammerhead vs Polynesian rat

Sphyrna corona compared with Rattus exulans

Key Differences

• Hammerhead is Critically Endangered while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	Hammerhead	Polynesian rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Carcharhiniformes (Ground Sharks)	Rodentia (Rodents)
Family	Sphyrnidae (Hammerhead Sharks)	Muridae (Mice & Rats)
Genus	Sphyrna (Hammerhead Sharks)	Rattus
Species	Sphyrna corona	Rattus exulans

Evolutionary Relationship

Hammerhead and Polynesian rat share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Hammerhead

CR — Critically Endangered

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	Hammerhead	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hammerhead

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Polynesian rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical coniferous forests, among 4 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (6 countries), Europe (United Kingdom), North America (United States), Oceania and the Pacific (11 countries), and South America (Chile).