Stephen Dalton / Horse-fly (Tabanus) taking off, controlled conditions.

Alex Hyde / Horsefly (Philipomyia aprica) photographed on a white background. Aosta Valley, Monte Rosa Massif, Pennine Alps, Italy. July.

Kim Taylor / Golden eyed horse fly (Chrysops quadratus) female on acorn, Surrey, England, August

Nick Upton / Very large female Horse fly (Philipomyia aprica) feeding from Common hogweed (Heracleum sphondylium) flowers, Julian Alps, Slovenia, July

Nick Upton / A strictly nectar-feeding species of Horse fly (Pangonius pyritosus) with a very long proboscis foraging on Cretan oregano (Origanum onites) flowers, Lesbos / Lesvos, Greece, May.

Nick Upton / Horsefly / Horse fly / Cleg fly (Tabanus promesogaeus) feeding from Wild carrot / Queen Anne's lace (Daucus carota) flowers, Lesbos / Lesvos, Greece, May.

Nick Upton / A nectar-feeding species of Horse fly (Pangonius funebris), a carpenter bee mimic, using its long proboscis to forage on Milk thistle (Carduus marianus) near the coast with the sea in the background,...

Nick Upton / White form of Goldenrod crab spider (Misumenia vatia) camouflaged on Wild Angelica (Angelica sylvestris) flowers sinking fangs into the head of a large Horse fly (Dasyrhamphis anthracinus). Corsica, F...

Nick Upton / White form of Goldenrod crab spider (Misumenia vatia) camouflaged on Wild Angelica (Angelica sylvestris) flowers sinking fangs into the head of a large Horse fly (Dasyrhamphis anthracinus). Corsica, F...

Nick Upton / Large black Horse fly (Dasyrhamphis anthracinus) feeding on Angelica (Angelica sylvestris) umbel flowerhead. Corsica, France, June.

Nick Upton / Large black Horse fly (Dasyrhamphis anthracinus) head on view, feeding on Wild angelica (Angelica sylvestris) umbel flowerhead. Corsica, France, June.

Nick Upton / Large black Horse fly (Dasyrhamphis anthracinus) female feeding on Angelica (Angelica sylvestris) umbel flowerhead as a small solitary bee flies past. Corsica, France, June.