Long-tailed Sylph vs Ruddy Shelduck

Aglaiocercus kingii compared with Tadorna ferruginea

Key Differences

• Long-tailed Sylph is Least Concern while Ruddy Shelduck is Not Evaluated.

Taxonomic Classification

Rank	Long-tailed Sylph	Ruddy Shelduck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Apodiformes (Apodiformes)	Anseriformes (Anseriformes)
Family	Trochilidae	Anatidae
Genus	Aglaiocercus	Tadorna
Species	Aglaiocercus kingii	Tadorna ferruginea

Evolutionary Relationship

Long-tailed Sylph and Ruddy Shelduck share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Long-tailed Sylph

LC — Least Concern

Ruddy Shelduck

NE — Not Evaluated

Physical Characteristics

Attribute	Long-tailed Sylph	Ruddy Shelduck
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.

Ruddy Shelduck

Habitat

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

Range

Widely distributed across Asia (Israel, Taiwan), Europe (19 countries), and North America (United States).

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.

Ruddy Shelduck

Ruddy Shelduck (Tadorna ferruginea) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway