Grey Box vs Long-tailed Sylph

Eucalyptus microcarpa compared with Aglaiocercus kingii

Key Differences

• Grey Box is Endangered while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Grey Box	Long-tailed Sylph
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Aves (Birds)
Order	Myrtales (Myrtales)	Apodiformes (Apodiformes)
Family	Myrtaceae	Trochilidae
Genus	Eucalyptus	Aglaiocercus
Species	Eucalyptus microcarpa	Aglaiocercus kingii

Conservation Status

Grey Box

EN — Endangered

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Grey Box	Long-tailed Sylph
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Grey Box

Habitat

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

Range

Found in Brazil. Currently classified as Endangered 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.