a barred owl shows off its nictitating membrane giving it an ghostly appearance

owl barred nictitating membrane ghostly hunter isolated bars bird prey birdwatching blink blinking menacing mysterious blue brown eerie eye eyelid fauna forest frightening macabre animal avian people nocturnal northwoods one ornithology passerine perch perched predator raptor scary single sit sitting solitary songbird spinechilling spooky spotted strix varia supernatural third woodland yellow eastman united states wisconsin