Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) in flight, stealing fish from Arctic Tern (Sterna paradisaea). Shetland Islands, Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Tern (Sterna paradisaea) in flight chasing Arctic Skua (Stercorarius parasiticus) that has stolen its food. Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) pair stealing fish from Arctic Tern (Sterna paradisaea) Shetland Islands, Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) pair stealing fish from Arctic Tern (Sterna paradisaea) in flight, Shetland Islands, Scotland, UK, July. (non-ex)

Phil Savoie / Painted nomad bee (Nomada fucata) female, kleptoparasite outside the nest burrow of Yellow legged mining bee (Andrena flavipes) where it will kill the larvae in the burrow before laying its own eggs w...

Phil Savoie / Root maggot fly (Leucophora sp.) kleptoparasitic on bees including mining bees of the genus Andrena, waiting outside mining bee nest burrow, Monmouthshire, Wales, UK. April.

Phil Savoie / Painted nomad bee (Nomada fucata) female inspecting Yellow legged mining bee (Andrena flavipes) nest burrows to lay eggs in. Monmouthshire, Wales, UK, April.

Phil Savoie / Painted nomad bee (Nomada fucata) female, kleptoparasite of Yellow legged mining bee (Andrena flavipes), inspecting nests to lay eggs in. Monmouthshire, Wales, UK. April.

David Tipling / Common cuckoo (Cuculus canorus) mobbed by Meadow pipits (Anthus pratensis) Caithness Scotland May

David Tipling / Common cuckoo (Cuculus canorus) mobbed by Meadow pipits (Anthus pratensis) Caithness Scotland May

David Tipling / Great skua (Stercorarius skua) attacking Gannet (Morus bassanus) on route back to its colony, to make it disgorge fish, behaviour known as Kleptoparasitism (parasitism by theft) Hermaness, Unst, Shetl...

Jen Guyton / Fork-tailed drongo (Dicrurus adsimilis) hovers over a foraging Meerkat (Suricata suricatta). The drongo will imitate the alarm call of other birds and then swoop down and steal the food the meerkat ha...