Long-tailed Sylph vs Slender Dogtooth Moss

Aglaiocercus kingii compared with Cynodontium gracilescens

Key Differences

Long-tailed Sylph is Least Concern while Slender Dogtooth Moss is Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Slender Dogtooth Moss
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Bryophyta
Class	Aves (Birds)	Bryopsida (Bryopsida)
Order	Apodiformes (Apodiformes)	Dicranales (Dicranales)
Family	Trochilidae	Rhabdoweisiaceae
Genus	Aglaiocercus	Cynodontium
Species	Aglaiocercus kingii	Cynodontium gracilescens

Conservation Status

Long-tailed Sylph

LC — Least Concern

Slender Dogtooth Moss

EN — Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Slender Dogtooth Moss
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.

Slender Dogtooth Moss

Habitat

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

Range

Distributed across Norway, Sweden, Taiwan, and United States. 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.