Long-tailed Sylph vs River Lamprey

Aglaiocercus kingii compared with Lampetra ayresii

Taxonomic Classification

Rank	Long-tailed Sylph	River Lamprey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Petromyzonti (Petromyzonti)
Order	Apodiformes (Apodiformes)	Petromyzontiformes (lamprey)
Family	Trochilidae	Petromyzontidae
Genus	Aglaiocercus	Lampetra
Species	Aglaiocercus kingii	Lampetra ayresii

Evolutionary Relationship

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

Conservation Status

Long-tailed Sylph

LC — Least Concern

River Lamprey

LC — Least Concern

Physical Characteristics

Attribute	Long-tailed Sylph	River Lamprey
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.

River Lamprey

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.