Coastal Silver-stiletto vs Leatherback Sea Turtle

Acrosathe annulata compared with Dermochelys coriacea

Key Differences

• Coastal Silver-stiletto is Least Concern while Leatherback Sea Turtle is Vulnerable.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Leatherback Sea Turtle
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum	Arthropoda (सन्धिपाद)	Chordata (रज्जुकी)
Class	Insecta (कीट)	Reptilia (सरीसृप)
Order	Diptera (मक्खी)	Testudines (कछुआ)
Family	Therevidae	Cheloniidae (Sea Turtles)
Genus	Acrosathe	Chelonia (Green Sea Turtles)
Species	Acrosathe annulata	Dermochelys coriacea

Evolutionary Relationship

Coastal Silver-stiletto and Leatherback Sea Turtle share a common ancestor at the Kingdom level: Animalia. (प्राणी)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Coastal Silver-stiletto	Leatherback Sea Turtle
Diet	—	Carnivore
Average Lifespan	—	50 years
Average Length	—	2.0 m
Average Weight	—	500.0 kg

Habitat & Geographic Range

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Coastal Silver-stiletto

Coastal silver stiletto (Acrosathe annulata) is a slender robber fly in the family Therevidae, native to northwestern Europe, including the United Kingdom, France, the Netherlands, Belgium, and Scandinavia. Adults are found on coastal sand dunes and sandy heathland, where they perch on bare sand to ambush small flying insects. Stiletto flies in the family Therevidae are characterised by a slender body, long pointed abdomen, and predatory habits; adults prey on a variety of small dipterans and other flying insects during warm, sunny periods. Larvae develop in sandy soil, where they are also predatory, feeding on other invertebrate larvae. Acrosathe annulata is a habitat specialist restricted to open, sandy coastal habitats with sparse vegetation—environments that have declined substantially across northwestern Europe due to dune stabilisation, recreational disturbance, and the cessation of traditional dune management. The IUCN lists it as Least Concern, though regional conservation bodies in the United Kingdom have flagged population declines. It is considered an indicator of high-quality coastal sand dune habitats and is monitored through national invertebrate surveys.

Leatherback Sea Turtle

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