Birds have a nictitating membrane beneath their eyelid. It is stored on the inside edge of the eye and sweeps across vertically and helps keep the eye moist and protects it during flight. I just happened to catch this one as it was closed across the eye of the Sandhill Crane.
Country United States
State Illinois
Location Chain O'Lakes State Park
Gender Unknown
Age Adult
- Created Timestamp06/06/2020 10:19:15
- CameraCanon EOS 7D Mark II
- Aperture7.1
- Focal Length400
- Iso250
- Shutter Speed1/500