These beetles are bright metallic green with long antennae. The males have large swollen hind femora and open elytra. Length 8 to 10mm.
The adults visit many flowers, particularly yellow ones, to feed on their pollen. The larvae develop in the old stems of plants such a ragwort.
Seen April to September, in open flowery habitats such as meadows and gardens. Common and widespread throughout Britain, declining further north of Wales.
Photograph of Swollen- thighed Beetle (Oedemera nobilis) taken June 2014, local woodland margin, Staffordshire. © Pete Hillman 2014. Camera used Nikon D3200, with Sigma 105mm macro lens.