Black-thighed Puffleg vs Gorgeted Puffleg

Eriocnemis derbyi compared with Eriocnemis isabellae

Key Differences

• Black-thighed Puffleg is Near Threatened while Gorgeted Puffleg is Critically Endangered.

Taxonomic Classification

Rank	Black-thighed Puffleg	Gorgeted Puffleg
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum same	Chordata (حبليات)	Chordata (حبليات)
Class same	Aves (طيور)	Aves (طيور)
Order same	Apodiformes (سماميات)	Apodiformes (سماميات)
Family same	Trochilidae	Trochilidae
Genus same	Eriocnemis	Eriocnemis
Species	Eriocnemis derbyi	Eriocnemis isabellae

Evolutionary Relationship

Black-thighed Puffleg and Gorgeted Puffleg share a common ancestor at the Genus level: Eriocnemis.

Conservation Status

Black-thighed Puffleg

NT — Near Threatened

Gorgeted Puffleg

CR — Critically Endangered

Physical Characteristics

Attribute	Black-thighed Puffleg	Gorgeted Puffleg
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-thighed Puffleg

Habitat

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

Range

Distributed across Colombia, Ecuador, and Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Gorgeted Puffleg

Habitat

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

Range

Distributed across Colombia and Norway. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-thighed Puffleg

An Andean puffleg hummingbird named for the males' distinctive velvety black thighs contrasting with the characteristic white leg feather puffs, black-thighed pufflegs inhabit humid montane forest and forest edges in Ecuador and Colombia at elevations of 1,500–3,500 meters. Males display glittering green plumage with a violet-blue tail. Listed as Near Threatened due to deforestation of the Andean cloud forest, with populations declining as the specialized high-altitude forest habitat is cleared for agriculture.

Shared Countries

Both species can be found in 2 countries:

🇨🇴 Colombia 🇳🇴 Norway