Long-tailed Sylph vs Red-tailed Monkey

Aglaiocercus kingii compared with Cercopithecus ascanius

Taxonomic Classification

Rank	Long-tailed Sylph	Red-tailed Monkey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Apodiformes (Apodiformes)	Primates (Primates)
Family	Trochilidae	Cercopithecidae (Old World Monkeys)
Genus	Aglaiocercus	Cercopithecus
Species	Aglaiocercus kingii	Cercopithecus ascanius

Evolutionary Relationship

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

Conservation Status

Long-tailed Sylph

LC — Least Concern

Red-tailed Monkey

LC — Least Concern

Physical Characteristics

Attribute	Long-tailed Sylph	Red-tailed Monkey
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.

Red-tailed Monkey

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.