Definition of deer fly in English:

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deer fly

noun

1A bloodsucking louse fly which is a parasite of deer. It loses its wings on finding a host, and the female gives birth to fully grown larvae.
  • Lipoptena cervi, family Hippoboscidae
Example sentences
  • Swatting at mosquitoes and deer flies, the five picked their way through the Florida scrub, trying to avoid the briars and sawgrass sharp as a sword blade.
  • The mosquitoes and horse and deer flies were out in force and bent on extracting blood and flesh.
  • For years I had a terrible problem with face flies, deer flies and ticks.
Image of deer fly
2A bloodsucking horsefly which attacks humans and other large mammals. It can transmit various diseases, including tularaemia.
Example sentences
  • Biting flies common in the U.S. include the species Chrysops discalis (deer fly), Chrysops aestuans, Chrysops relictus, and Chrysozona pluvialis.
  • Having the rabbit as my companion, albeit for only a short while, was a welcome distraction from the black deer flies attracted by my sweat.

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