Blacktail spurdog vs Yellow-billed Cacique

Squalus melanurus compared with Amblycercus holosericeus

Key Differences

• Blacktail spurdog is Data Deficient while Yellow-billed Cacique is Least Concern.

Taxonomic Classification

Rank	Blacktail spurdog	Yellow-billed Cacique
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Aves (Birds)
Order	Squaliformes (Squaliformes)	Passeriformes (Songbirds)
Family	Squalidae	Icteridae
Genus	Squalus	Amblycercus
Species	Squalus melanurus	Amblycercus holosericeus

Evolutionary Relationship

Blacktail spurdog and Yellow-billed Cacique share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Blacktail spurdog

DD — Data Deficient

Yellow-billed Cacique

LC — Least Concern

Physical Characteristics

Attribute	Blacktail spurdog	Yellow-billed Cacique
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blacktail spurdog

Yellow-billed Cacique

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Blacktail spurdog

The Blacktail spurdog (Squalus melanurus) is a species in the genus Squalus. It is currently classified as Data Deficient on the IUCN Red List.

Yellow-billed Cacique

Yellow-billed Cacique (Amblycercus holosericeus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.