Long-tailed Sylph vs Timor Mountain Gum

Aglaiocercus kingii compared with Eucalyptus urophylla

Key Differences

• Long-tailed Sylph is Least Concern while Timor Mountain Gum is Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Timor Mountain Gum
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Aves (Birds)	Magnoliopsida (Dicots)
Order	Apodiformes (Apodiformes)	Myrtales (Myrtales)
Family	Trochilidae	Myrtaceae
Genus	Aglaiocercus	Eucalyptus
Species	Aglaiocercus kingii	Eucalyptus urophylla

Conservation Status

Long-tailed Sylph

LC — Least Concern

Timor Mountain Gum

EN — Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Timor Mountain Gum
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.

Timor Mountain Gum

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Afrotropic biogeographic realm.

Range

Distributed across Brazil and Congo (Republic). 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.