Description: A 8.5-10.5mm long bright metallic green beetle with conspicuous yellow sides to the elytra. Locally common in marshy places, especially bare mud at the side of ponds and lakes.

NI account: Widespread but local. Often abundant where it occurs.

Ecology: Helophilous, often seen running in warm sunshine on partially vegetated shorelines of lakes and rivers, usually on clayish substrata.

Distribution: A European Wide-temperate (63) or possibly Southern-temperate species found across most of Europe except the extreme north, into north Africa and east to the Caucasus and western Turkestan.

Similar Species: Separated from all other Agonum by the uniform green or bronze-green colouration and broad yellow margins to the elytra. Chlaenius vestitus is superficially similar in colour but the upper surface is punctured and pubsecent.

Key Identification Features:

• Medium, pronotum narrower than elytra, hind angles rounded
• Legs long and slender
• Mentum with median tooth (Fig. 103)
• Claws simple
• Upper surface metallic green, elytra with broad yellow margins

Distribution Map from NBN: Agonum marginatum at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Agonum marginatum at iNaturalist World Species Observations database.

GBIF data for Agonum marginatum | Classification: Insecta, Coleoptera, Carabidae, Agonum

Thumbnails for genus Agonum