Links below to research and news about these major predators of deer. Population and other information for each state (use drop down menu above "By State") is near the bottom of the right column.
Bears "Black Bear populations have been on the increase for over 20 years. Population estimates range from 850,000 to one million. Black bears are the most specialized of deer predators, and they focus mostly on fawns. Remember, a black bear can smell about 400 times as well as a blood hound. The frequently used “fact” that fawns do not have scent is totally false! I personally have watched bears go into a search pattern in large food plots, picking up the scent of hidden fawns and quickly killing them." - Dr. James C. Kroll, Deadly Deer Predators - North American Whitetail. September 10, 2021
Other predators that can sometimes kill deer include bobcats and lynx.