Long-tailed Sylph vs Rusty-headed Spinetail

Aglaiocercus kingii compared with Synallaxis fuscorufa

Key Differences

• Long-tailed Sylph is Least Concern while Rusty-headed Spinetail is Vulnerable.

Taxonomic Classification

Rank	Long-tailed Sylph	Rusty-headed Spinetail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Apodiformes (Apodiformes)	Passeriformes (Songbirds)
Family	Trochilidae	Furnariidae
Genus	Aglaiocercus	Synallaxis
Species	Aglaiocercus kingii	Synallaxis fuscorufa

Evolutionary Relationship

Long-tailed Sylph and Rusty-headed Spinetail share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Long-tailed Sylph

LC — Least Concern

Rusty-headed Spinetail

VU — Vulnerable

Physical Characteristics

Attribute	Long-tailed Sylph	Rusty-headed Spinetail
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.

Rusty-headed Spinetail

Habitat

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

Range

Distributed across Colombia and Norway. Currently classified as Vulnerable 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 2 countries:

🇨🇴 Colombia 🇳🇴 Norway