horn fly

noun
a small bloodsucking fly, Haematobia irritans, that is a pest, especially of cattle.

Origin:
1700–10, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

horn fly

(Haematobia irritans), insect of the family Muscidae (order Diptera) and a serious cattle pest. Adult horn flies cluster at the base of horns and on the neck and rump of cattle and suck blood. Their attacks cause loss of weight and milk production in affected cattle.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The revenue generated by these activities is adversely affected by arthropod pests, specifically the horn fly and stable fly.
Distribution of horn flies on individual cows as a percentage of the total horn fly population.
Often there is an additional target, such as horn fly, which breeds in dung.
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