Sylphe à queue d'azur vs Pixie Foam

Aglaiocercus kingii compared with Stereocaulon pileatum

Key Differences

Sylphe à queue d'azur is Least Concern while Pixie Foam is Critically Endangered.

Taxonomic Classification

Rank	Sylphe à queue d'azur	Pixie Foam
Kingdom	Animalia (animal)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Aves (oiseau)	Lecanoromycetes (Lecanoromycetes)
Order	Apodiformes (Apodiformes)	Lecanorales (Lecanorales)
Family	Trochilidae	Stereocaulaceae
Genus	Aglaiocercus	Stereocaulon
Species	Aglaiocercus kingii	Stereocaulon pileatum

Conservation Status

Sylphe à queue d'azur

LC — Least Concern

Pixie Foam

CR — Critically Endangered

Physical Characteristics

Attribute	Sylphe à queue d'azur	Pixie Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Sylphe à queue d'azur

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Pixie Foam

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

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

Sylphe à queue d'azur

One of the most strikingly ornamented hummingbirds, male long-tailed sylphs have iridescent green plumage and dramatically elongated, ribbon-like outer tail feathers reaching up to 22 cm — over three times the body length. Found in Andean cloud forests of Colombia and Venezuela, they inhabit humid montane forest between 1,400–2,800 meters elevation. Males perform elaborate display flights to attract females. Their extravagant tails are a classic example of sexual selection via female preference.