Anup Shah / Leopard cub with ticks in ears {Panthera pardus} Masai Mara, Kenya

David Hall / Sandperch (Parapercis sp) with two Isopod (Cymothoidae) ectoparasites on body. Pantar, Alor Archipelago, Indonesia.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites found on Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. Finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites whilst standing on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. The finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.

David Perpinan / Captive bearded dragon (Pogona vitticeps) suffering from mite infestation. Small repro only

Doug Perrine / Humpback whales (Megaptera novaeangliae) a calf following its mother, accompanied by Leatherback or Doublespotted queenfish, (Scomberoides lysan) which often associate with Humpback whales, probably t...

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

John Abbott / Small Ground Finch (Geospiza fuliginosa) feeding on ectoparasites on skin of Marine Iguana (Amblyrhynchus cristatus) James Bay, Santiago Island, Galapagos

Pete Oxford / Palm weevil {Rhynchophorus sp} with ectoparasites. Madre de Dios rainforest, Peru