One of the tropical birds you'll see while driving around the southern area of Puerto Rico is the Turkey Vulture. We rarely see them in the Rincon area. But, after you cross a row of mountains in Cabo Rojo you see dozens. The climate seems to change as well. The south is dryer. The heat is different.
Early in the morning you see them on telephone posts, with their wings spread out. My son says they're waiting for drunk drivers. But they're just warming their wings.
You see many of them flying low over the hills and along highways. They hunt by smell, and pick up odors of dead things.
This guys didn't like being photographed. One hissed continually until we left.
Rincon Puerto Rico