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#3521 · 🐝 bees, wasps & ants

Turnip Sawfly

🇳🇱 Knollenbladwesp ·Athalia rosae

🐝 Bees, wasps & ants 📍 in the Netherlands
Turnip Sawfly, photo 1 of 7
1/7 © bsteer · CC BY-NC 4.0

what is it?

The turnip sawfly Athalia rosae is a typical sawfly with dark green or blackish 18–25 mm long larvae that feed on plants of the brassica family, and can sometimes be a pest. It winters below the ground, emerging in early summer as a 7–8 mm adult with a mainly orange body and a black head. The adult feeds on nectar.

base stats

  • NL sightings 264iNaturalist, research grade
  • worldwide 7,409iNaturalist observations

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 264 times in the Netherlands on iNaturalist: the #19 most seen of the bees, wasps & ants in NL.
  • 7,409 observations worldwide on iNaturalist.
  • Scientifically named in 1758 (268 years ago).

fact sheet

English
Turnip Sawfly
Nederlands
Knollenbladwesp
scientific name
Athalia rosae
class
Insecta
order
Hymenoptera
family
Tenthredinidae
sightings in NL
264
sightings in Europe
6,397
sightings worldwide
7,409
GBIF records in NL
13,074
weight
—
length
—
lifespan
—
named
1758

relatives· Tenthredinidae

Sources: iNaturalist taxon 333154, Wikidata Q1680271, GBIF 4490913, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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