Black Banded Spider Wasp vs Coastal Silver-stiletto

Anoplius viaticus compared with Acrosathe annulata

Taxonomic Classification

Rank	Black Banded Spider Wasp	Coastal Silver-stiletto
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Arthropoda (节肢动物门)	Arthropoda (节肢动物门)
Class same	Insecta (昆蟲綱)	Insecta (昆蟲綱)
Order	Hymenoptera (膜翅目)	Diptera (雙翅目)
Family	Pompilidae	Therevidae
Genus	Anoplius	Acrosathe
Species	Anoplius viaticus	Acrosathe annulata

Evolutionary Relationship

Black Banded Spider Wasp and Coastal Silver-stiletto share a common ancestor at the Class level: Insecta. (昆蟲綱)

Conservation Status

Black Banded Spider Wasp

LC — Least Concern

Coastal Silver-stiletto

LC — Least Concern

Physical Characteristics

Attribute	Black Banded Spider Wasp	Coastal Silver-stiletto
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Banded Spider Wasp

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Black Banded Spider Wasp

The Black Banded Spider Wasp (Anoplius viaticus) is a species in the genus Anoplius. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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