The Turkey Vulture (TV) is one of two vultures found in Arizona. The other vulture is the Black Vulture. The Adult TV has a red head and the juvenile has a black head (however, the overall sizes of the two birds are the same). It is generally known that the TV has a "hiss" vocalization. The hiss is used when competing for access to food or tree roost space with other vultures. For several years we have been trying to record this sound. In 1998 one of the captive (and non-releaseable) birds housed at Liberty Wildlife in Scottsdale, AZ decided to bond with one of the animal caregivers, Anne. This bird is named Bailey and whenever Anne would enter his cage Bailey would perform what appears to be a courtship display for Anne. Bailey would stretch out his wings as far as he could (because of an injury Bailey has restricted wing extention) cause his neck to expand, and put his head down on his chest. Then he would rotate in place to show himself off. During this display he makes a loud "Grrrr" sound. This courtship sound was recorded June 6, 1998. So instead of the hiss, a completely new sound was discovered. After the courtship sound was recorded a new TV was received by Liberty Wildlife. This bird was easily agitated by entering his cage or looking directly at the bird. When agitated he would hiss and sometimes "growl". The growl was similar, but different, from the courtship sound. Both the hiss and the growl were recorded. Because of high background sound levels outside, the hissing bird was moved inside to improve the ambient noise level. This only partially succeded. There is still a lot of background noise from refrigerators and air conditioning units. The hissing/growling bird was recorded on August 11, 1998.