Andy Sands / Ichneumon wasp (Rhyssa persuasoria) one of the largest British wasps, at rest on Dock leaf, UK, Captive

Colin Varndell / Ectoparasitic Ichneumon Wasp (Ichneumonidae) probing into pine bark with ovipositor. Dorset, UK, June.

Andy Sands / Ichneumon wasp (Rhyssa persuasoria) one of the largest British wasps, using antennae to detect larvae of Wood wasp prey {Urocerus gigas} within cut pine, UK, Captive

Andy Sands / Ichneumon wasp (Rhyssa persuasoria) one of the largest British wasps, on cut pine, UK, Captive

Andy Sands / Ichneumon wasp (Rhyssa persuasoria) one of the largest British wasps, preening on Dock leaf, UK, Captive

Stephen Dalton / Ichneumon wasp (Rhyssa persuasoria) in flight, parasite of the Giant Wood Wasp (Sirex gigas), UK

Stephen Dalton / Ichneumon wasp (Rhyssa persuasoria) parasite of the Giant Wood Wasp (Sirex gigas), UK

Stephen Dalton / Ichneumon wasp (Rhyssa persuasoria) in flight, parasite of the Giant Wood Wasp (Sirex gigas), UK

Brian Lightfoot / Ichneumon wasp {Rhyssa persuasoria} largest wasp in Britain, Cumberia, UK