Leatherback Sea Turtle vs Long-tailed Sylph

Dermochelys coriacea compared with Aglaiocercus kingii

Key Differences

Leatherback Sea Turtle is Vulnerable while Long-tailed Sylph is Least Concern.

Taxonomic Classification

Rank	Leatherback Sea Turtle	Long-tailed Sylph
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum same	Chordata (Kordalılar)	Chordata (Kordalılar)
Class	Reptilia (Sürüngenler)	Aves (kuş)
Order	Testudines (Kaplumbağa)	Apodiformes (Ebabiller)
Family	Cheloniidae (Sea Turtles)	Trochilidae
Genus	Chelonia (Green Sea Turtles)	Aglaiocercus
Species	Dermochelys coriacea	Aglaiocercus kingii

Evolutionary Relationship

Leatherback Sea Turtle and Long-tailed Sylph share a common ancestor at the Phylum level: Chordata. (Kordalılar)

Göster Phylum: Chordata

Conservation Status

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Long-tailed Sylph

LC — Least Concern

Physical Characteristics

Attribute	Leatherback Sea Turtle	Long-tailed Sylph
Diet	Carnivore	—
Average Lifespan	50 years	—
Average Length	2.0 m	—
Average Weight	500.0 kg	—

Habitat & Geographic Range

Leatherback Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 5 distinct biome types spanning the Australasia and Indomalayan and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. 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.

Leatherback Sea Turtle

The leatherback is the largest living turtle and the fourth-heaviest reptile. Unlike other turtles, it has a soft, leathery shell.

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.