Black-Necked Grebe vs Broadgill Catshark

Podiceps nigricollis compared with Apristurus riveri

Key Differences

• Black-Necked Grebe is Endangered while Broadgill Catshark is Least Concern.

Taxonomic Classification

Rank	Black-Necked Grebe	Broadgill Catshark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Chondrichthyes (Cartilaginous Fish)
Order	Podicipediformes (Podicipediformes)	Carcharhiniformes (Ground Sharks)
Family	Podicipedidae	Scyliorhinidae
Genus	Podiceps	Apristurus
Species	Podiceps nigricollis	Apristurus riveri

Evolutionary Relationship

Black-Necked Grebe and Broadgill Catshark share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-Necked Grebe

EN — Endangered

Broadgill Catshark

LC — Least Concern

Physical Characteristics

Attribute	Black-Necked Grebe	Broadgill Catshark
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-Necked Grebe

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 8 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (5 countries) and North America (United States). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Broadgill Catshark

Habitat

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

Range

Found in Venezuela.

Black-Necked Grebe

Black-Necked Grebe (Podiceps nigricollis) 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.

Broadgill Catshark

The Broadgill Catshark (Apristurus riveri) is a species in the genus Apristurus. It is currently classified as Least Concern on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.