Long-tailed Sylph vs Slender Waxcap

Aglaiocercus kingii compared with Hygrocybe radiata

Key Differences

• Long-tailed Sylph is Least Concern while Slender Waxcap is Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Slender Waxcap
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Aves (Birds)	Agaricomycetes (Mushrooms)
Order	Apodiformes (Apodiformes)	Agaricales (Gilled Mushrooms)
Family	Trochilidae	Hygrophoraceae
Genus	Aglaiocercus	Hygrocybe
Species	Aglaiocercus kingii	Hygrocybe radiata

Conservation Status

Long-tailed Sylph

LC — Least Concern

Slender Waxcap

EN — Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Slender Waxcap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Long-tailed Sylph

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Slender Waxcap

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

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

Long-tailed Sylph

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway