Coastal Silver-stiletto vs Northern Bettong

Acrosathe annulata compared with Bettongia tropica

Key Differences

• Coastal Silver-stiletto is Least Concern while Northern Bettong is Endangered.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Northern Bettong
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum	Arthropoda (सन्धिपाद)	Chordata (रज्जुकी)
Class	Insecta (कीट)	Mammalia (स्तनधारी)
Order	Diptera (मक्खी)	Diprotodontia (डाएप्रोटोडोंटिया)
Family	Therevidae	Potoroidae
Genus	Acrosathe	Bettongia
Species	Acrosathe annulata	Bettongia tropica

Evolutionary Relationship

Coastal Silver-stiletto and Northern Bettong share a common ancestor at the Kingdom level: Animalia. (प्राणी)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Northern Bettong

EN — Endangered

Physical Characteristics

Attribute	Coastal Silver-stiletto	Northern Bettong
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Northern Bettong

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.