Piotr Naskrecki / Yellow Fever Mosquito (Aedes aegypti) female feeding on human blood, Gorongosa National Park, Mozambique

David Tipling / 2020VISION / Cuckoo (Cuculus canorus) 12 day chick in Reed Warbler nest (Acrocephalus scirpaceus) fed by Reed warbler, Fenland, Norfolk, UK, May

David Tipling / 2020VISION / Reed Warbler (Acrocephalus scirpaceus) at nest feeding 12 day Cuckoo chick (Cuculus canorus), Fenland, Norfolk, UK, May

David Tipling / 2020VISION / Reed warbler (Acrocephalus scirpaceus) feeding 12 day chick of European cuckoo (Cuculus canorus) in its nest, East Anglian Fens, Norfolk, May. 2020VISION Book Plate.

David Tipling / 2020VISION / 12 day chick of European cuckoo (Cuculus canorus) in Reed warbler's (Acrocephalus scirpaceus) nest, East Anglian Fens, Norfolk, May

Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. The body is becoming engorged with blood. Malaria vector. Africa, June. Engorging sequence 2 of 3. Model released

Stephen Dalton / Hedgesparrow / Dunnock (Prunella modularis)feeding European cuckoo (Cuculus canorus) in oak tree, UK

Mark Payne-Gill / Parasitic grubbs emerging from Red admiral butterfly larva {Vanessa atalanta} UK

Doug Perrine / Parasitic copepods {Copepoda sp.} on snout of Hammerhead shark {Sphyrnidae sp.} Bahamas

Kim Taylor / Dor beetle {Geotrupes vernalis} with phoretic mites, UK.

PREMAPHOTOS / Pupae of parasitic wasp {Braconidae family} on hawkmoth caterpillar host, Peru, South America

David Kjaer / Juvenile European cuckoo {Cuculus canorus} fed by Reed warbler {Acrocephalus scirpaceus}. Bucks, UK. Cuckoos lay their eggs in the nests of reed warblers and when they hatch, the warbler mother will a...