Eastern Pygmy Marmoset vs Long-tailed Sylph

Cebuella niveiventris compared with Aglaiocercus kingii

Key Differences

• Eastern Pygmy Marmoset is Vulnerable while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Eastern Pygmy Marmoset	Long-tailed Sylph
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Aves (นก)
Order	Primates (อันดับวานร)	Apodiformes (Apodiformes)
Family	Callitrichidae	Trochilidae
Genus	Cebuella	Aglaiocercus
Species	Cebuella niveiventris	Aglaiocercus kingii

Evolutionary Relationship

Eastern Pygmy Marmoset and Long-tailed Sylph share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Eastern Pygmy Marmoset

VU — Vulnerable

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Eastern Pygmy Marmoset	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Eastern Pygmy Marmoset

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Shared Countries

Both species can be found in 1 countries:

🇪🇨 Ecuador