#3778 · 🪰 flies & mosquitoes
Twin-lobed Deer Fly
🇳🇱 Gewone goudoogdaas ·Chrysops relictus
🪰 Flies & mosquitoes 📍 in the Netherlands
📍 Scharnegoutum, NL-FR, NL
📍 Korf, Almkerk, North Brabant, NL
📍 5944 Arcen, Nederland
📍 Venneperhout, Nieuw-Vennep, Noord-Holland, NL
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Roger McLachlan · CC BY-NC 4.0
- 2. © Bernd Bäumler · CC BY-NC 4.0
- 3. © jo_calder · CC BY-NC 4.0
- 4. © Manfred Auer · CC BY-NC 4.0
- 5. © Vladimir Bryukhov · CC BY-NC 4.0
- 6. © Bernd Bäumler · CC BY-NC 4.0
- 7. Scharnegoutum, NL-FR, NL:© Marsel · CC BY-NC 4.0
- 8. Korf, Almkerk, North Brabant, NL:© Helene Versluijs · CC BY-NC 4.0
- 9. 5944 Arcen, Nederland:© Mark Schellekens · CC BY-NC 4.0
- 10. Venneperhout, Nieuw-Vennep, Noord-Holland, NL:© wandeltantes · CC BY-NC 4.0
what is it?
41 in) length, The larvae feed upon organic matter in damp soils, and are termed hydrobionts in that they inhabit areas of high water content.
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 263 times in the Netherlands on iNaturalist: the #27 most seen of the flies & mosquitoes in NL.
- 3,861 observations worldwide on iNaturalist.
- Scientifically named by Johann Wilhelm Meigen in 1820 (206 years ago).
fact sheet
- English
- Twin-lobed Deer Fly
- Nederlands
- Gewone goudoogdaas
- scientific name
- Chrysops relictus
- class
- Insecta
- order
- Diptera
- family
- Tabanidae
- sightings in NL
- 263
- sightings in Europe
- 2,805
- sightings worldwide
- 3,861
- GBIF records in NL
- 12,713
- weight
- —
- length
- —
- lifespan
- —
- named
- 1820 by Johann Wilhelm Meigen
relatives· Tabanidae
Sources: iNaturalist taxon 130392, Wikidata Q4164069, GBIF 1497357, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.