Related Program: NatureNotes Deer Flies "Bite"! By Rudy Mancke • Jun 29, 2018 Related Program: NatureNotes ShareTweetEmail A feeding Deer Fly. Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org Deer Flies, or Yellow Flies, are out in number this year, especially near water. And, yest, they will "bite"! Listen Listening... / 1:00 NatureNotes is a production of South Carolina Public Radio. Tags: NatureNatureNotesSCETV Appscetv.orgShareTweetEmailView the discussion thread.