Meaning ofdeer flyin English

Noun

1. blood-feeding horsefly (Chrysops) with gold/green eyes
2. tabanid fly pest to livestock, humans
3. parasitic fly (Lipoptena cervi) on deer, elk
   The deer fly species is known to infest deer and elk.
4. eurasian louse fly species (Hippoboscidae)
   Eurasian louse flies are typically found on mammals like deer.