If you find yourself in the presence of a deer, the best thing to do is to remain calm. Avoid making sudden movements or loud noises, as this may startle the deer and cause it to become aggressive. If the deer does not seem afraid of you, slowly back away while keeping your eyes on the animal. If the deer approaches you, make yourself as small as possible and make yourself as uninteresting to the deer as possible. Avoid eye contact and remain still until the deer wanders off.