Coastal Silver-stiletto vs Jerdon's Courser

Acrosathe annulata compared with Rhinoptilus bitorquatus

Key Differences

• Coastal Silver-stiletto is Least Concern while Jerdon's Courser is Critically Endangered.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Jerdon's Courser
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum	Arthropoda (절지동물)	Chordata (척삭동물)
Class	Insecta (곤충)	Aves (새)
Order	Diptera (파리목)	Charadriiformes (도요목)
Family	Therevidae	Glareolidae
Genus	Acrosathe	Rhinoptilus
Species	Acrosathe annulata	Rhinoptilus bitorquatus

Evolutionary Relationship

Coastal Silver-stiletto and Jerdon's Courser share a common ancestor at the Kingdom level: Animalia. (동물)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Jerdon's Courser

CR — Critically Endangered

Physical Characteristics

Attribute	Coastal Silver-stiletto	Jerdon's Courser
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.

Jerdon's Courser

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway. Currently classified as Critically Endangered 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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway