Broadgill Catshark vs laverca

Apristurus riveri compared with Alauda arvensis

Key Differences

• Broadgill Catshark is Least Concern while laverca is Vulnerable.

Taxonomic Classification

Rank	Broadgill Catshark	laverca
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (ave)
Order	Carcharhiniformes (Ground Sharks)	Passeriformes (Songbirds)
Family	Scyliorhinidae	Alaudidae
Genus	Apristurus	Alauda
Species	Apristurus riveri	Alauda arvensis

Evolutionary Relationship

Broadgill Catshark and laverca share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Broadgill Catshark

LC — Least Concern

laverca

VU — Vulnerable

Physical Characteristics

Attribute	Broadgill Catshark	laverca
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Broadgill Catshark

Habitat

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

Range

Found in Venezuela.

laverca

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Widely distributed across Europe (5 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, New Zealand). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

laverca

Celebrada na literatura e poesia europeia por seu complexo e melodioso canto entoado durante espetaculares voos de exibição, a cotovia-comum (Alauda arvensis) sobe verticalmente centenas de metros acima de campos abertos, pradarias e charnecas da Europa e Ásia, produzindo um torrente ininterrupto de canto que pode durar até uma hora. Os machos podem produzir mais de 700 frases de canto distintas. Outrora extremamente abundante nos campos europeus, as populações de cotovias diminuíram mais de 70% desde 1970 devido à intensificação agrícola.