Long-tailed Sylph vs Plain-flanked Rail

Aglaiocercus kingii compared with Rallus wetmorei

Key Differences

• Long-tailed Sylph is Least Concern while Plain-flanked Rail is Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Plain-flanked Rail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Apodiformes (Apodiformes)	Gruiformes (Gruiformes)
Family	Trochilidae	Rallidae
Genus	Aglaiocercus	Rallus
Species	Aglaiocercus kingii	Rallus wetmorei

Evolutionary Relationship

Long-tailed Sylph and Plain-flanked Rail share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Long-tailed Sylph

LC — Least Concern

Plain-flanked Rail

EN — Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Plain-flanked Rail
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.

Plain-flanked Rail

Habitat

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

Range

Distributed across Norway and Venezuela. Currently classified as Endangered 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.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇻🇪 Venezuela