Fluffy down feathers lie next to the skin for insulation. Filoplumes form crests and tall displays. Eyes Sharp eyesight lets birds of prey see about 10 times better than humans. Owls' eyes are adapted to see in dim light, almost 100 times better than we can. Ears Birds have small ear openings on each side of the head, just below and in back of the eyes.
All raptors have excellent hearing, and owls have the sharpest hearing of all.
Beak A raptor's beak is sharp, curved and powerful for grasping and eating prey. The size and shape of the beak depend on the size of the bird's prey. Nostrils Two nostrils for breathing are located on top of the upper beak. Most birds, including vultures, have a poorly developed sense of smell. Muscles Powerful flight muscles are attached to the large breastbone.