Brook Thistle vs Long-tailed Sylph

Cirsium rivulare compared with Aglaiocercus kingii

Key Differences

• Brook Thistle is Extinct while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Brook Thistle	Long-tailed Sylph
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Aves (Birds)
Order	Asterales (Daisies & Sunflowers)	Apodiformes (Apodiformes)
Family	Asteraceae (Daisy Family)	Trochilidae
Genus	Cirsium	Aglaiocercus
Species	Cirsium rivulare	Aglaiocercus kingii

Conservation Status

Brook Thistle

EX — Extinct

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Brook Thistle	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Thistle

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (7 countries).

Long-tailed Sylph

Habitat

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

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Brook Thistle

The Brook Thistle (Cirsium rivulare) is a species in the genus Cirsium. It is currently classified as Extinct on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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