Hydrotaea irritans: the sheep headfly in Britain.
D000818:Animals; D006259:Craniocerebral Trauma / Q000517:prevention & control / Q000662:veterinary*; D004175:Diptera / Q000254:growth & development; D009198:Myiasis / Q000517:prevention & control*; D012621:Seasons; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D006113:United Kingdom