Blackhead worm vs Long-tailed Sylph

Aporrectodea longa compared with Aglaiocercus kingii

Key Differences

• Blackhead worm is Not Evaluated while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Blackhead worm	Long-tailed Sylph
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Clitellata (Clitellata)	Aves (Birds)
Order	Crassiclitellata (Crassiclitellata)	Apodiformes (Apodiformes)
Family	Lumbricidae	Trochilidae
Genus	Aporrectodea	Aglaiocercus
Species	Aporrectodea longa	Aglaiocercus kingii

Evolutionary Relationship

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

Conservation Status

Blackhead worm

NE — Not Evaluated

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Blackhead worm	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackhead worm

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

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.

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and 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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway