Humpback smooth hound vs Yellow-billed Cacique

Mustelus whitneyi compared with Amblycercus holosericeus

Key Differences

• Humpback smooth hound is Critically Endangered while Yellow-billed Cacique is Least Concern.

Taxonomic Classification

Rank	Humpback smooth hound	Yellow-billed Cacique
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Carcharhiniformes (Ground Sharks)	Passeriformes (Songbirds)
Family	Triakidae	Icteridae
Genus	Mustelus	Amblycercus
Species	Mustelus whitneyi	Amblycercus holosericeus

Evolutionary Relationship

Humpback smooth hound and Yellow-billed Cacique share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Humpback smooth hound

CR — Critically Endangered

Yellow-billed Cacique

LC — Least Concern

Physical Characteristics

Attribute	Humpback smooth hound	Yellow-billed Cacique
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Humpback smooth hound

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Found in Chile. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Yellow-billed Cacique

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

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.