King/Common Eider vs Long-tailed Sylph

Somateria spectabilis compared with Aglaiocercus kingii

Key Differences

• King/Common Eider is Not Evaluated while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	King/Common Eider	Long-tailed Sylph
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Anseriformes (Anseriformes)	Apodiformes (Apodiformes)
Family	Anatidae	Trochilidae
Genus	Somateria	Aglaiocercus
Species	Somateria spectabilis	Aglaiocercus kingii

Evolutionary Relationship

King/Common Eider and Long-tailed Sylph share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

King/Common Eider

NE — Not Evaluated

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	King/Common Eider	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

King/Common Eider

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway