yes Eyelid The bird's eyelid closes over the eye from the bottom to the top, opposite of how the human eyelid covers from the top to the bottom. This is an individual Red-Tail Hawk who is falling asleep. Sometimes a half-closed eye may mark an individual who is sick or unwell, or may just be falling asleep. Nictitating membrane Raptors also have a nictitating membrane that closes over the eye separately from the eye lid. It passes from the inner corner of the eye out to the outer edge and appears to be a dullish grey. ed-Tail - same individual            Immature - less than one year old                       Pale yellow-brown            Two-Years Old                       Color rises from the bottom and begins to turn the eye to a dark brown            Four-Years Old                       Color is now a solid mahogany            Eight-Years Old                       Color is still a solid mahogany ooper's Hawk            Chick                       Blue and then brown Image courtesy of Lee Slikkers.            Immature                       Yellow            Mature - Two year old bird                       Orange            Mature                       Red Image courtesy of Steve Dickson. reat Horned Owl            Immature                       Yellow            Mature                       Yellow olden Eagle            Immature                       Golden or dark brown            Mature                       Golden or dark brown erlin            Immature                       Dark brown            Mature                       Dark brown to black estrel            Immature                       Dark brown            Two-Years Old                       Dark brown to black rairie Falcon            Immature                       Dark brown            Fourteen Years Old                       Dark brown to black ald Eagle            Immature                       Brown or pale brown            Mature                       Bright pale yellow or buff urasian Eagle Owl - same individual            Eyass                       Bright orange            Immature                       Bright orange            Mature yrfalcon            Immature                       Dark brown            Mature                       Dark brown to black oshawk            Immature - chick                       Blue Image courtesy of Becky Brunotte.            Immature - brancher to first moult                       Yellow or tan            Mature - Two-Year Old                       As the bird matures the eyes become orange, then red            Mature - Seven-Year Old                       Here the bird's eye is beginning to turn red with the top still retaining some of the murky orange color. Image courtesy of Dion Thomson.            Mature - Seven-Year Old                       Here the bird's eye is a solid red. Goshawks from the Southern United States typically develop more red eyes as adults than Goshawks from other genetic pools. Image courtesy of Becky Brunotte. sprey            Chick                       Osprey chicks hatch with blue eyes that change to the orange-brown shortly. This Osprey was in rehabilitation, but the color change can be seen.            Immature                       Immature Osprey have bright orange-brown eyes.            Mature                       Adult Osprey have yellow eyes. nowy Owl            Immature                       Yellow            Mature                       Yellow harp-Shin Hawk            Immature                       Yellow Image courtesy of Tasha Leong.            Mature (but not too old)                       Orange - will become red as the bird ages All images and text Copyright © 2004 - 2020 - Lydia Ash