Nigel Cattlin / Pollen beetle (Brassicogethes aeneus) infestation on Nipplewort (Lapsana communis). Berkshire, England, UK. July.

Adrian Davies / Oak processionary moth (Thaumetopoea processionea) nest removal from infested Oak (Quercus sp) tree with cherry picker. Surrey, England, UK. July 2018.

Tony Wu / Sacculina barnacle infested crab, Tonga, Pacific Ocean.

Alex Hyde / Detail of decaying tree stump infested with blue fungus (Chlorociboria sp.). Magallanes National Reserve, Patagonia, Chile. November.

Ashley Cooper / Maggots on a dead sheep

Tony Wu / Humpback whale (Megaptera novaeangliae) entangled in longline fishing gear immobilizing both pectoral fins, and infested with Whale lice (Cyamus boopis) Vava'u, Tonga, Pacific Ocean.

Philippe Clement / Red mason bee (Osmia bicornis / Osmia rufa) infested with Hairy-footed mites (Chaetodactylus) Belgium, April

Cyril Ruoso / Leaf infested by parasites, Barro Colorado Island, Panama

SINCLAIR STAMMERS / Cattle biting louse (Damalinia bovis) on hairs, in temperate climates cattle may be infested with this species of Mallophaga. Length 3mm approximately

SINCLAIR STAMMERS / Cattle biting louse (Damalinia bovis) in temperate climates cattle may be infested with this species of Mallophaga. Length 3mm approximately

Mark Moffett / Honey Bee (Apis mellifera) pupa infested with Honeybee Mite (Varroa destructor), the most devestating pet to honeybees worldwide.

Mark Moffett / Honey Bee (Apis mellifera) infested with Honeybee Mites (Varroa destructor), the most devestating pest to honeybees worldwide.