Research conducted by State Farm Insurance indicates that the autumn months are when motorists are most at risk of crashes involving deer. Deer-vehicle accidents reach their peak in October, per a recent article by New York Upstate, though the risk persists until the end of January. As the article notes, the risk is so high in those months because they constitute both the mating season for deer, as well as a period of heightened activity as deer forage in advance of the winter months.
A 2018 analysis by State Farm estimates that the risk of hitting deer or other large mammals “doubles in the fall.” The risk of hitting deer is highest at the dawn and dusk hours, raising the need for drivers to be vigilant. State Farm advises drivers take a number of precautions, including: driving slowly, especially at dawn and dusk; wearing seatbelts; anticipating additional deer to follow any deer they see; using high beams, unless oncoming traffic are approaching; and avoiding distractions, such as phones or food. In the event that a driver encounters a deer, State Farm advises braking if possible, but not swerving, which “can result in a more severe crash.”