Hydrotaea spp

From Cow
Adult Hydrotaea flies

Hydrotaea are a parasitic head fly which causes pruritus in cattle worldwide[1].

Species of Hydrotaea which have been recognized as disease causing in cattle include:

  • H. irritans
  • H. aenescens[2]

These flies feed on secretions from the eyes and nose and on the cellular debris at the grown horn base. They are sometimes associated with mastitis in cows[3].

Topical insecticides such as pyrethrins (eg, cypermethrin or cyfluthrin) help control these parasites[4].


  1. Merck Vet Manual
  2. Hogsette JA et al (2002) Development of Hydrotaea aenescens (Diptera: Muscidae) in manure of unweaned dairy calves and lactating cows. J Econ Entomol 95(2):527-530
  3. Chirico J et al (1997) Summer mastitis experimentally induced by Hydrotaea irritans exposed to bacteria. Med Vet Entomol 11(2):187-192
  4. Borges FA et al (2008) Endectocide activity of a new long-action formulation containing 2.25% ivermectin+1.25% abamectin in cattle. Vet Parasitol 155(3-4):299-307