Long-tailed Sylph vs pretty marbled

Aglaiocercus kingii compared with Deltote deceptoria

Key Differences

• Long-tailed Sylph is Least Concern while pretty marbled is Vulnerable.

Taxonomic Classification

Rank	Long-tailed Sylph	pretty marbled
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Insecta (Insects)
Order	Apodiformes (Apodiformes)	Lepidoptera (Butterflies & Moths)
Family	Trochilidae	Noctuidae
Genus	Aglaiocercus	Deltote
Species	Aglaiocercus kingii	Deltote deceptoria

Evolutionary Relationship

Long-tailed Sylph and pretty marbled share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Long-tailed Sylph

LC — Least Concern

pretty marbled

VU — Vulnerable

Physical Characteristics

Attribute	Long-tailed Sylph	pretty marbled
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.

pretty marbled

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.