MYN / Gil Wizen / Human botfly (Dermatobia hominis), adult and larva. Cayo District, Belize. Composite image. Meetyourneighbours.net project

Richard Du Toit / Burchell's Zebra (Equus burchellii) reacting to parasitic Bot Fly (Oestridae) trying to lay eggs on it, KwaZulu-Natal, South Africa

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

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.

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.), young individual parasitized by Phoridae fly larvae, Los Amigos Biological Station, Madre de Dios, Amazonia, Peru.

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

Naskrecki & Guyton / Bat louse fly (Penicillidia sp.) from Gorongosa National Park, Mozambique

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

Piotr Naskrecki / Wingless Bat Fly (Penicillidia sp) on Lesser Long-fingered Bat (Miniopterus fraterculus), Gorongosa National Park, Mozambique

Piotr Naskrecki / Wingless Bat Fly (Penicillidia sp) on head of Long-winged Bat (Miniopterus mossambicus), Gorongosa National Park, Mozambique