1. Small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals
   "Hikers applied insect repellent to ward off blackflies";
   - black fly, buffalo gnat
    
2. Blackish aphid that infests e.g. beans and sugar beets
   "The blackfly infestation spread quickly through the bean field";
   - bean aphid, Aphis fabae

Derived forms: blackflies, black flies

Type of: aphid, gnat

Part of: Aphis, genus Aphis, genus Simulium, Simulium

Encyclopedia: Blackfly