Long-tailed Sylph vs Sumatran Serow

Aglaiocercus kingii compared with Capricornis sumatraensis

Key Differences

• Long-tailed Sylph is Least Concern while Sumatran Serow is Vulnerable.

Taxonomic Classification

Rank	Long-tailed Sylph	Sumatran Serow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Apodiformes (Apodiformes)	Artiodactyla (Even-toed Ungulates)
Family	Trochilidae	Bovidae (Bovids)
Genus	Aglaiocercus	Capricornis
Species	Aglaiocercus kingii	Capricornis sumatraensis

Evolutionary Relationship

Long-tailed Sylph and Sumatran Serow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Long-tailed Sylph

LC — Least Concern

Sumatran Serow

VU — Vulnerable

Physical Characteristics

Attribute	Long-tailed Sylph	Sumatran Serow
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.

Sumatran Serow

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.