#3886 · 🪰 flies & mosquitoes
violet black-legged robber fly
🇳🇱 Zwarte bladjager ·Dioctria atricapilla
📍 Groesbeek, Nederland
📍 Ankeveen, Nederland
📍 Schinveld, Nederland
📍 Graafland, Groot-Ammers, Zuid-Holland, NL
📍 4121 KK Everdingen, Nederland
📍 Noordwijkerhout, Nederland
📍 Netherlands
📍 Terneuzen, Netherlands
📍 Groesbeek, Nederland
📍 3732 HW De Bilt, Nederland
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. Groesbeek, Nederland:© Herman Berteler · CC BY-NC 4.0
- 2. Ankeveen, Nederland:© dr. Werner de Gier · CC BY-NC 4.0
- 3. Schinveld, Nederland:© Co Waalen · CC BY-NC 4.0
- 4. Graafland, Groot-Ammers, Zuid-Holland, NL:© no rights reserved · CC0
- 5. 4121 KK Everdingen, Nederland:© Marleen Schouten · CC BY-NC 4.0
- 6. Noordwijkerhout, Nederland:© Michel Langeveld · CC BY 4.0
- 7. Netherlands:© Floris P · CC BY-NC 4.0
- 8. Terneuzen, Netherlands:© Remco Hofland · CC BY-NC 4.0
- 9. Groesbeek, Nederland:© Herman Berteler · CC BY-NC 4.0
- 10. 3732 HW De Bilt, Nederland:© Marsel · CC BY-NC-SA 4.0
what is it?
The violet black-legged robber fly , Dioctria atricapilla , is a species of robber fly in the subfamily Dasypogoninae. This 9- to 12-millimeter long insect has a wingspan of roughly 7 to 9 mm and short, three-segmented antennae. It's a predatory insect, feeding mainly on smaller flies and predatory hymenopterans. It primarily thrives in grassland, and is seen from May to July.
base stats
Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).
fun facts
- Spotted 39 times in the Netherlands on iNaturalist.
- 1,101 observations worldwide on iNaturalist.
- Scientifically named by Johann Wilhelm Meigen in 1804 (222 years ago).
fact sheet
- English
- violet black-legged robber fly
- Nederlands
- Zwarte bladjager
- scientific name
- Dioctria atricapilla
- class
- Insecta
- order
- Diptera
- family
- Asilidae
- sightings in NL
- 39
- sightings in Europe
- 982
- sightings worldwide
- 1,101
- GBIF records in NL
- 4,095
- weight
- —
- length
- —
- lifespan
- —
- named
- 1804 by Johann Wilhelm Meigen
relatives· Asilidae
#3776 📷 10Stripe-legged Robber Fly
🇳🇱 Gewone bladjager
Dioctria hyalipennis
👀 298 in NL
#3779 📷 10Common Awl Robber Fly
🇳🇱 Bosrandroofvlieg
Neoitamus cyanurus
👀 242 in NL
#3800 📷 10Dune Robber Fly
🇳🇱 Zandroofvlieg
Philonicus albiceps
👀 148 in NL
#3804 📷 10kite-tailed robberfly
🇳🇱 Gewone roofvlieg
Tolmerus atricapillus
👀 138 in NL
#3820 📷 10Roodbaardroofvlieg
Eutolmus rufibarbis
👀 99 in NL
#3826 📷 10bumblebee robberfly
🇳🇱 Gele hommelroofvlieg
Laphria flava
👀 90 in NL
#3835 📷 10fan-bristled robberfly
🇳🇱 Borstelroofvlieg
Dysmachus trigonus
👀 85 in NL
#3844 📷 7Hornet Robber Fly
🇳🇱 Hoornaarroofvlieg
Asilus crabroniformis
👀 70 in NL
Sources: iNaturalist taxon 547115, Wikidata Q1887957, GBIF 1656376, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.
