Long-tailed Sylph vs Round Ray

Aglaiocercus kingii compared with Rajella fyllae

Key Differences

• Long-tailed Sylph is Least Concern while Round Ray is Not Evaluated.

Taxonomic Classification

Rank	Long-tailed Sylph	Round Ray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Elasmobranchii
Order	Apodiformes (Apodiformes)	Rajiformes (Rajiformes)
Family	Trochilidae	Rajidae
Genus	Aglaiocercus	Rajella
Species	Aglaiocercus kingii	Rajella fyllae

Evolutionary Relationship

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

Conservation Status

Long-tailed Sylph

LC — Least Concern

Round Ray

NE — Not Evaluated

Physical Characteristics

Attribute	Long-tailed Sylph	Round Ray
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.

Round Ray

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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