Hawk, transparent eyelids (nicitating membrane slow motion)

Did you know that some raptors, if not all, have built-in goggles? Just like sharks, they have protective layers covering their eyes, probably when they dive and hunt.
It is commonly known as nictitating membrane. Enjoy in slow motion!

It has been pointed out by an expert that the information regarding the dive speed of this species in incorrect. Hawks can dive up to 120 mph, not 200. Peregrine Falcon, however, can!