“The red-headed vultures on Rook Island mostly come from Singapore and are harmless. But if you see one asking for my alimony check, shoot on sight.”
— Survival Guide
They can be found flying above the Rook Islands. Unlike other animals from the Predator Pack DLC, they are not hostile to Jason or any other human. Red-headed Vultures have low health and can be shot with any weapon. To save ammo and make killing them easier, wait for a vulture to land on the ground.
These will usually be found near the top of mountains, where by day Vultures are already gliding. The Red-headed Vulture will more likely be on ground though, and the player's approach will scare them into flight. Between the Outposts Hubris Farm and Cradle Gas (central North Island) on a local mountain near a Glider you should be able to encounter the Red-headed Vulture.