Coastal Silver-stiletto vs Collared Pratincole

Acrosathe annulata compared with Glareola pratincola

Key Differences

• Coastal Silver-stiletto is Least Concern while Collared Pratincole is Not Evaluated.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Collared Pratincole
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Aves (Birds)
Order	Diptera (Diptera)	Charadriiformes (Charadriiformes)
Family	Therevidae	Glareolidae
Genus	Acrosathe	Glareola
Species	Acrosathe annulata	Glareola pratincola

Evolutionary Relationship

Coastal Silver-stiletto and Collared Pratincole share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Collared Pratincole

NE — Not Evaluated

Physical Characteristics

Attribute	Coastal Silver-stiletto	Collared Pratincole
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.

Collared Pratincole

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and Ukraine.

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.

Collared Pratincole

The Collared Pratincole, known scientifically as <em>Glareola pratincola</em>, is a wading bird belonging to the family Glareolidae. <em>Glareola pratincola</em> is characterised by its distinctive pale throat patch bordered by a dark necklace or collar, giving the species its common name. The species is known for its swallow-like flight silhouette, with long, pointed wings and a forked tail, which it uses to pursue flying insects in aerial sorties over open habitats. It is reported to occur in Belgium, Denmark, Norway, Sweden, and Ukraine. Collared Pratincoles typically breed in open, dry habitats such as grasslands, mudflats, and steppe environments near water, and are often highly gregarious during the breeding season. Detailed biological traits including typical lifespan, body length, and weight are poorly documented for this species in available literature.

Shared Countries

Both species can be found in 4 countries:

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