Coastal Silver-stiletto vs Pistol case-bearer

Acrosathe annulata compared with Coleophora anatipennella

Taxonomic Classification

Rank	Coastal Silver-stiletto	Pistol case-bearer
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum same	Arthropoda (सन्धिपाद)	Arthropoda (सन्धिपाद)
Class same	Insecta (कीट)	Insecta (कीट)
Order	Diptera (मक्खी)	Lepidoptera (शल्कपंखी गण)
Family	Therevidae	Coleophoridae
Genus	Acrosathe	Coleophora
Species	Acrosathe annulata	Coleophora anatipennella

Evolutionary Relationship

Coastal Silver-stiletto and Pistol case-bearer share a common ancestor at the Class level: Insecta. (कीट)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Pistol case-bearer

LC — Least Concern

Physical Characteristics

Attribute	Coastal Silver-stiletto	Pistol case-bearer
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.

Pistol case-bearer

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden