Heather Angel / Parasitic wasp (Gasteruption assectator) nectaring on Common rue (Ruta graveolens). Surrey, England, UK. July.

Heather Angel / Chalcid wasp (Gasteruption jaculator) nectaring on Yarrow (Achillea millefolium) cultivar, picking up pollen on legs and head. Long ovipositor used to lays eggs inside solitary bee nests. In garden, S...

Rod Williams / Parasitic wasp (Gasteruption jaculator) female with a male above on a tree trunk in Warwick Gardens, Peckham, London, England, UK. July.

Rod Williams / Parasitic wasp (Gasteruption jaculator) on a tree trunk in Warwick Gardens, Peckham, London, UK. July.

Andy Sands / Parasitic wasp (Gasteruption jaculator) ovipositing into the nest of solitary bee in garden bee hotel, Hertfordshire, England, UK, July

Nick Upton / Male Gasteruptiid wasp (Gasteruption sp.) a nest parasite of solitary bees and waps, nectar feeding on on Rock samphire flowers (Crithmum maritimum), Algarve, Portugal, August 2013.

Kim Taylor / Ichneumon wasp (Gasteruption jaculator) laying eggs on top of wooden fence post, Surrey, England, July.

Kim Taylor / Ichneumon wasp (Gasteruption jaculator) laying eggs on top of wooden fence post, Surrey, England, July.

Andy Sands / Parasitic Wasp (Gasteruption assector) female on bracken frond. West Sussex, England, UK, August.

Andy Sands / Wasp (Gasteruption jaculator) female ovipositing into nest of solitary bee in artificial bee house. London, England, June.

Andy Sands / Wasp (Gasteruption jaculator) female ovipositing into nest of solitary bee in artificial bee house. London, England, June.

Andy Sands / Wasp (Gasteruption jaculator) investigating sealed hole on artificial bee house. London, England, June.

Andy Sands / Wasp (Gasteruption jaculator) female ovipositing into nest of solitary bee in artificial bee house. London, England, June.

Nick Upton / Female Gasteruptiid wasp (Gasteruption sp) with long needle-like ovipositor, a nest parasite of solitary bees and waps, nectar feeding on Wild Angelica (Angelica sylvestris) umbel flowers. Corsica, Fr...

Andy Sands / Wasp (Gasteruption jaculator) female preening, Captive, UK, August

Andy Sands / Wasp (Gasteruption jaculator) female cleaning antennae, Captive, UK, August

Andy Sands / Kleptoparasitic wasp (Gasteruption jaculator) female, roosting on grass stem, Hertfordshire, England, UK. July. Focus stacked.

Nick Upton / Wild carrot wasp (Gasteruption assectator) female, a parasite of Yellow-face bees (Hylaeus sp.), visiting an insect hotel looking for a host, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption assectator) female, a parasite of Yellow-face bees (Hylaeus spp.), hovering by host nest burrows in an insect hotel, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption assectator) female, a parasite of Yellow-face bees (Hylaeus spp.), inspecting host nest burrows in an insect hotel, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, a parasite of solitary bees and wasps, visiting an insect hotel in search of host nests, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, laying eggs in the nest of a Common Yellow-face bee (Hylaeus communis) in an insect hotel, Wiltshire garden, UK. July.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, a parasite of solitary bees and wasps, hovering by an insect hotel in search of host nests, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, laying eggs in the nest of a Common Yellow-face bee (Hylaeus communis) in an insect hotel, Wiltshire garden, UK. July.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, a parasite of solitary bees and wasps, visiting an insect hotel in search of host nests, Wiltshire garden, UK. June.

Nick Upton / Wild carrot wasp (Gasteruption jaculator) female, a parasite of solitary bees and wasps, visiting an insect hotel in search of host nests, Wiltshire garden, UK. June.

Jiri Lochman / Gasteruptid wasp (Pseudofoenus sp.) female, portrait, on sand, Durba Hills, Little Sandy Desert, Western Australia. August. (Gasteruptiidae)

Jiri Lochman / Gasteruptid wasp (Gasteruption sp.) male, resting on a leaf, Mount Gibbs Nature Reserve, Western Australia. March. (Gasteruptiidae)

Jiri Lochman / Gasteruptid wasp (Gasteruption sp.) female, resting on a leaf, Mount Gibbs Nature Reserve, Western Australia. March. (Gasteruptiidae)

Jiri Lochman / Gasteruptid wasp (Gasteruption sp.) female, foraging among Eucalyptus (Eucalyptus sp.) flowers, Mount Gibbs Nature Reserve, Western Australia. March. (Gasteruptiidae)

Jiri Lochman / Gasteruptid wasp (Pseudofoenus sp.) female, resting on a tiny desert plant (Chenopod sp.) to escape the hot desert sand, Durba Hills, Little Sandy Desert, Western Australia. August. (Gasteruptiidae)

Jiri Lochman / Gasteruptid wasp (Gasteruption sp.) female, exhibiting full length of its strikingly long ovipositor while feeding on a Waxflower (Chamelaucium sp.), Dryandra Forest, Western Australia. October. (Gast...

Marie Lochman / Gasteruptid wasp (Hyptiogaster sp.) female, feeding on a Waxflower (Chamelaucium sp.) flowers, Kalbarri National Park, Western Australia. August. (Gasteruptiidae)

Marie Lochman / Gasteruptid wasp (Gasteruption sp.) female, feeding on a Myrtle (Myrtus sp.) flower Bindoo Hill Nature Reserve, Western Australia. September. (Gasteruptiidae)

Marie Lochman / Gasteruptid wasp (Gasteruption sp.) female, feeding on a Waxflowers (Chamelaucium sp.), Dryandra Forest, Western Australia. October. (Gasteruptiidae)

Marie Lochman / Gasteruptid wasp (Pseudofoenus sp.) feeding on a flower, Wandoo National Park, Darling Range, Western Australia. September. (Gasteruptiidae)

Marie Lochman / Gasteruptid wasp (Hyptiogaster sp.) female in flight, De La Poer Range Nature Reserve, Gibson Desert, Western Australia. August. (Gasteruptiidae)

Marie Lochman / Gasteruptid wasp (Hyptiogaster sp.) female, resting in desert, De La Poer Range Nature Reserve, Gibson Desert, Western Australia. August. (Gasteruptiidae)

Nigel Cattlin / Giant ichneumon wasp (Gasteruption jaculator) female visiting hogweed (Heracleum sphondylium) flowers, Berkshire, UK, July.

Alan Williams / Parasitic wasp (Gasteruption assectator) feeding on Astrantia flower in garden, Cheshire, UK, June.

Andy Sands / Parasitic wasp (Gasteruption jaculator) male resting on leaf, Hertfordshire, England, UK, May - Focus Stacked