Owls actually have three eyelids which serve three individual purposes. One of the eyelids that owls have is for keeping their eyes clean and free from debris, the second is for sleeping, and the third is specifically for blinking. These eyelids serve very important purposes, one of which is protecting their eyes so they can hunt for prey without any problems.
Owls also need to sleep, which is why they have an individual set for this as well. These creatures have very keen eyesight, though they are far-sighted, which is especially useful for spotting their prey on the ground from far atop a tall tree.
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