Lake Lamprey vs Long-tailed Sylph

Entosphenus macrostomus compared with Aglaiocercus kingii

Key Differences

• Lake Lamprey is Endangered while Long-tailed Sylph is Least Concern.

Taxonomic Classification

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

Evolutionary Relationship

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

Conservation Status

Lake Lamprey

EN — Endangered

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Lake Lamprey	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Lake Lamprey

Long-tailed Sylph

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

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.