Coastal Silver-stiletto vs Eastern Pygmy Marmoset

Acrosathe annulata compared with Cebuella niveiventris

Key Differences

• Coastal Silver-stiletto is Least Concern while Eastern Pygmy Marmoset is Vulnerable.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Eastern Pygmy Marmoset
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Arthropoda (สัตว์ขาปล้อง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Insecta (แมลง)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Diptera (แมลงวัน)	Primates (อันดับวานร)
Family	Therevidae	Callitrichidae
Genus	Acrosathe	Cebuella
Species	Acrosathe annulata	Cebuella niveiventris

Evolutionary Relationship

Coastal Silver-stiletto and Eastern Pygmy Marmoset share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Eastern Pygmy Marmoset

VU — Vulnerable

Physical Characteristics

Attribute	Coastal Silver-stiletto	Eastern Pygmy Marmoset
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.

Eastern Pygmy Marmoset

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. 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.