Long-tailed Sylph vs Marsh Cress

Aglaiocercus kingii compared with Rorippa islandica

Key Differences

Long-tailed Sylph is Least Concern while Marsh Cress is Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Marsh Cress
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Aves (Birds)	Magnoliopsida (Dicots)
Order	Apodiformes (Apodiformes)	Brassicales (Brassicales)
Family	Trochilidae	Brassicaceae
Genus	Aglaiocercus	Rorippa
Species	Aglaiocercus kingii	Rorippa islandica

Conservation Status

Long-tailed Sylph

LC — Least Concern

Marsh Cress

EN — Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Marsh Cress
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.

Marsh Cress

Habitat

Found across multiple habitat types including boreal forests and taiga, flooded grasslands and savannas, and Mediterranean forests and woodlands, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Libya), Asia (India), Europe (Iceland, Norway, Sweden), and North America (Canada, Mexico, 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.