These two were warming themselves from the morning sun after a very cold night. They are migrating through AZ at this time. Interesting facts about Turkey Vultures: 1)Turkey vultures act as nature's ultimate clean up crew. Using their keen sense of smell and sight, these vultures clean up dead animals and prevent the spread of disease and harmful bacteria. 2)The bald head, ultimately, is a matter of hygiene for vultures. 3)They possess NO voice box, turkey vultures have limited vocalization capabilities. They usually hiss when threatened.