Blood protein concentration and hematocrit (packed cell volume) values are easily obtained and can be useful in determining the health of trapped or captive birds (Hunter and Powers 1980, Duke and Redig 1984). However, if these parameters are to be useful, there must be baseline data for comparison. Bond and Gilbert (1958), Hunter and Powers (1980), and Gessaman et al. (1986) have provided data for a variety of raptors, yet information on vultures is lacking. Our purpose is to provide baseline data on the blood characteristics of the Black Vulture (Coragyps atratus) and the Turkey Vulture (Cathartes aura).