Long-tailed Sylph vs Mexican Agouti

Aglaiocercus kingii compared with Dasyprocta mexicana

Key Differences

• Long-tailed Sylph is Least Concern while Mexican Agouti is Critically Endangered.

Taxonomic Classification

Rank	Long-tailed Sylph	Mexican Agouti
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Aves (chim)	Mammalia (lớp Thú)
Order	Apodiformes (Bộ Yến)	Rodentia (Bộ Gặm nhấm)
Family	Trochilidae	Dasyproctidae
Genus	Aglaiocercus	Dasyprocta
Species	Aglaiocercus kingii	Dasyprocta mexicana

Evolutionary Relationship

Long-tailed Sylph and Mexican Agouti share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

Long-tailed Sylph

LC — Least Concern

Mexican Agouti

CR — Critically Endangered

Physical Characteristics

Attribute	Long-tailed Sylph	Mexican Agouti
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.

Mexican Agouti

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical coniferous forests, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Found in Cuba. Currently classified as Critically 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.