What unique structural feature is found on the potoo's upper eyelids?

Answer

Distinct slits or small notches running vertically

The potoo's eyelids possess distinct slits, or small notches, running vertically along the edge of the upper lid, which allow limited vision while appearing closed.

What unique structural feature is found on the potoo's upper eyelids?

#Videos

Potoos Are Hauntingly Cute - YouTube

birdcharacteristiccamouflageavianNocturnal