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

Alex Hyde / Cleg fly / Horsefly (Haematopota pluvialis) sucking blood from human.

Stephen Dalton / Mosquito (Culicidae) female feeding on human blood, controlled conditions

Konrad Wothe / Fly (Gymnosoma rotundatum) Bavaria, Germany. June.

Philippe Clement / Parasite fly / tachinid fly (Tachina fera) feeding on nectar from Hogweed (Heracleum sphondylium) in summer, France. August.

Naskrecki & Guyton / Parasitic fly (Raymondia sp.) on fur of Horseshoe bat (Rhinolophus mossambicus) from Gorongosa National Park, Mozambique

Naskrecki & Guyton / Parasitic fly (Raymondia sp.) on the wing membrane of the Horseshoe bat (Rhinolophus mossambicus) from Gorongosa National Park, Mozambique

Philippe Clement / Tachina flies (Tachina fera) nectaring on Umbellifer (Apiaceae) flowers in summer, Luxembourg, August.

Bernard Castelein / Fly (Eriothrix rufomaculata), KLein Schietveld, Brasschaat, Belgium. June

Rod Williams / Ladybird fly (Gymnosoma rotundatum) a rare / localised species Brockley Cemetery, Lewisham, London, England, UK. May.

Nick Upton / Swift lousefly (Craeterina pallida), a blood sucking parasite unique to swift nests, found on a Swift chick (Apus apus) and held in the hands of a bird ringer, Worlington, Suffolk, UK, July. Model rel...

Andy Sands / Tachnid fly (Phasia hemiptera) male, the female lays its eggs directly onto Forest Bugs and Green Shield Bugs where the larvae live as parasites, Hertfordshire, England, August