from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various stout, two-winged flies, chiefly of the genera Gasterophilus and Oestrus, having larvae that are parasitic on various animals, especially horses and sheep, and sometimes on humans.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. One of several dipterous insects of the family Oestridae, some of which are particularly troublesome to domestic animals on which they deposit their eggs.

from the GNU version of the Collaborative International Dictionary of English

  • n. A dipterous insect of the family (Estridæ, of many different species, some of which are particularly troublesome to domestic animals, as the horse, ox, and sheep, on which they deposit their eggs. A common species is one of the botflies of the horse (Gastrophilus equi), the larvæ of which (bots) are taken into the stomach of the animal, where they live several months and pass through their larval states. In tropical America one species sometimes lives under the human skin, and another in the stomach. See gadfly.

from The Century Dictionary and Cyclopedia

  • n. A name given to dipterous insects of the family Œstridæ, the larvæ of which infest different parts of living animals. See bot.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. stout-bodied hairy dipterous fly whose larvae are parasites on humans and other mammals


Sorry, no etymologies found.


  • The gruesome insect, called a botfly, lays its eggs on mosquitos which then bite humans, depositing the eggs under the skin, where they start to grow.

    HomePage - The Sun

  • My favorite question to ask an IDC is whether or not Yahweh created such pleasant and wonderful creatures as the botfly or the candiru in their current form.

    More on Signature in the Cell - The Panda's Thumb

  • A botfly might regard a herd of cattle as a moving archipelago.


  • Fird littermate had abig horribul disgustifying botfly larva in himz neck taht teh nyse vet tech at teh shelter taked owt fur him, but it leeved him wif a open hole in hims throat, an him still smaller than teh uvvers an week an shaky an stuff, an needing sum eggstra TLC.

    No, no, you go on. - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?

  • In the jar before us, a swatch of horse stomach lay at the bottom, studded with botfly larvae, a cluster of stony little hives.

    Parasite Rex

  • The botfly devours the fly; the bird, the botfly; the snake, the bird.

    Archive 2007-04-01

  • I ended up with a literal warehouse of such stuff and I can tell you now with considerable confidence that the larvae of the human botfly bore into the skin and gorge themselves, emerging as centimeter long maggots, while a Joshua Hendy nine-thousand horsepower steam turbine delivers a cruising speed of 16 knots at 78 rpm.

    Five tips to avoiding total disaster

  • And then we have the human bot fly ... yum yum ... scroll down about halfway to see human botfly larva, in and out of the body ... mmm, parasites!

    wench77 Diary Entry

  • And finally, for Lisa: No, I suspect the botfly you have to worry about laying eggs on horses legs is probably some sort of warble fly, where the larvae would grow under the skin.

    grouse Diary Entry

  • Many species of dipterous insects - fruit fly, face fly, botfly, horn fly, and housefly, for example - are targets for neem products.

    5 Effects on Insects


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  • US Railway Association, Standard Cipher Code, 1906: Railroad telegraph term meaning "Seller will not pay brokerage; we must look to buyer for it."

    January 21, 2013

  • It is. It's a really good book. :)

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  • Sounds like a good book, chained_bear!

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  • "During the summer, the animals take refuge in the high elevations to avoid the constant menace of botflies, warble flies, and mosquitoes."

    —James Campbell, The Final Frontiersman (New York and London: Atria Books, 2004), 265

    September 17, 2008