Flat-Stem Oat Grass vs Long-tailed Sylph

Danthonia compressa compared with Aglaiocercus kingii

Key Differences

• Flat-Stem Oat Grass is Not Evaluated while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Flat-Stem Oat Grass	Long-tailed Sylph
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Liliopsida (Monocots)	Aves (Birds)
Order	Poales (Grasses)	Apodiformes (Apodiformes)
Family	Poaceae (Grass Family)	Trochilidae
Genus	Danthonia	Aglaiocercus
Species	Danthonia compressa	Aglaiocercus kingii

Conservation Status

Flat-Stem Oat Grass

NE — Not Evaluated

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Flat-Stem Oat Grass	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Flat-Stem Oat Grass

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Distributed across Canada 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.