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

John Abbott / Western Bloodsucking Conenose (Triatoma protracta) on white background, Kernville, Kern County, California, USA, June.

John Abbott / Western Bloodsucking Conenose (Triatoma protracta) on white background, Kernville, Kern County, California, USA, June.

MYN / Clay Bolt / Bloodsucking Conenose (Triatoma gerstaeckeri) carrier of Chagas Disease, in bayou wetlands, Jean Lafitte National Park, Louisiana, United States, May. Meetyourneighbours.net project

Nick Upton / Duck Leech (Theromyzon tessulatum) waiting and ready to crawl up the nostrils of a duck to suck blood from its respiratory tracts, reaching out from a Delicate stonewort (Chara virgata) alga in a shal...

James Christensen / Equatorial Anole (Anolis aequatorialis) with a bloodsucking insect on its head, Andes, Ecuador