A new study shows the chance of hitting a deer in Iowa is rising. The odds drivers will hit a deer in Iowa are 1-in-68, compared to the national odds of 1-in-169. Deer generally travel in herds and are most active between dusk and dawn. Some tips to avoid deer include: use your high beams when possible at night; don’t rely on devices like deer whistles; and don’t veer when a deer jumps into your path.