In addition to scent marking, king vultures also produce a variety of vocalizations to attract mates. These include loud, deep booms, hisses, and whistles. They often engage in duetting, where a pair of vultures call back and forth to each other. These vocal displays help to establish and maintain pair bonds, as well as to attract new mates during the breeding season.
Visual displays may also play a role in mate attraction. King vultures have distinctive black and white plumage, with a prominent red and orange head and neck. These bright colors may help them to stand out in the forest canopy and attract the attention of potential mates.
Overall, the combination of scent marking, vocalizations, and visual displays helps king vultures to attract mates and establish successful breeding pairs.