Stephen Dalton / Horse fly (Tabanus sp) male taking off from poppy seed-head (Papaver rhoeas) Sussex, UK

MYN / Paul Harcourt Davies / Horsefly (Tabanus bovinus) close up of male feeding on fennel flower nectar (the females are blood suckers) Lazio, Italy, July. meetyourneighbours.net project

Luiz Claudio Marigo / Jabiru Stork (Jabiru mycteria) plagued by horseflies (Tabanidae). Pixaim River, The Pantanal wetlands of Mato Grosso State, Brazil, November.

Nick Upton / Cleg fly / Horsefly (Haematopa pluvialis) sucking blood from photographer's arm, Wiltshire pastureland, UK, June.

Michael Durham / Cape Sundew (Drosera capensis) with trapped Horse Fly (Tabanus bovinus), native to Cape Province, South Africa

Oliver Wright / Horsefly (Hybomitra sp) male resting, portrait. Skipwith Common National Nature Reserve, North Yorkshire, England, UK. May. Focus stacked image.

Oliver Wright / Hairy legged horsefly (Hybomitra bimaculata) female, portrait. Skipwith Common National Nature Reserve, North Yorkshire, England, UK. May. Focus stacked image.

Nick Upton / A strictly nectar-feeding Horse fly (Pangonius striatus), endemic to Sardinia, feeding on Sea holly flowers (Eryngium maritimum) on a beach, Sardinia, Italy, June.

Nick Upton / Large marsh horsefly (Tabanus autumnalis) resting on a fence, Dorset, UK, July.

Nick Upton / Large marsh horsefly (Tabanus autumnalis) resting on a fence, Dorset, UK, July.

Jan Hamrsky / Horse fly larva (Tabanidae), Europe, February, controlled conditions

Paul Bertner / Horse Fly (Haematopota sp), Danum Valley Conservation Area, Sabah, Borneo, Malaysia