Black Nerite vs Long-tailed Sylph

Theodoxus prevostianus compared with Aglaiocercus kingii

Key Differences

• Black Nerite is Endangered while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Black Nerite	Long-tailed Sylph
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Mollusca (มอลลัสกา)	Chordata (สัตว์มีแกนสันหลัง)
Class	Gastropoda (ชั้นแกสโทรโพดา)	Aves (นก)
Order	Cycloneritida (Cycloneritida)	Apodiformes (Apodiformes)
Family	Neritidae	Trochilidae
Genus	Theodoxus	Aglaiocercus
Species	Theodoxus prevostianus	Aglaiocercus kingii

Evolutionary Relationship

Black Nerite and Long-tailed Sylph share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Black Nerite

EN — Endangered

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Black Nerite	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Nerite

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found in Norway. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Long-tailed Sylph

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Black Nerite

The Black Nerite (Theodoxus prevostianus) is a species in the genus Theodoxus. It is currently classified as Endangered on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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