Coastal Silver-stiletto vs Tuart

Acrosathe annulata compared with Eucalyptus gomphocephala

Key Differences

• Coastal Silver-stiletto is Least Concern while Tuart is Vulnerable.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Tuart
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Arthropoda (Arthropods)	Magnoliophyta (Flowering Plants)
Class	Insecta (Insects)	Magnoliopsida (Dicots)
Order	Diptera (Diptera)	Myrtales (Myrtales)
Family	Therevidae	Myrtaceae
Genus	Acrosathe	Eucalyptus
Species	Acrosathe annulata	Eucalyptus gomphocephala

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Tuart

VU — Vulnerable

Physical Characteristics

Attribute	Coastal Silver-stiletto	Tuart
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.

Tuart

Habitat

Found across multiple habitat types including deserts and xeric shrublands, flooded grasslands and savannas, and Mediterranean forests and woodlands spanning the Afrotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Libya, South Africa), Asia (Cyprus, Taiwan, Yemen), Europe (Malta, Portugal, Spain), North America (United States), and South America (Brazil). Currently classified as Vulnerable 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.