@Kildale. I came across this one in my bird pics. It is a 'woody' and it shows the double eyelid that they have. Perhaps you can explain the reason Kildale, or might it be simply for dust protection? View attachment 7420
I don't know much about them but they are used for different purposes. I found this in Google. The eyelids of a bird are not used in blinking. Instead the eye is lubricated by the nictitating membrane, a third concealed eyelid that sweeps horizontally across the eye like a windscreen wiper. The nictitating membrane also covers the eye and acts as a contact lens in many aquatic birds when they are under water. When sleeping, the lower eyelid rises to cover the eye in most birds. You could perhaps look further into this in Google.
@Raddang - I don't believe I've ever seen the second membrane of a bird's eye that clearly before. Good shot
That's something I didn't know that is very interesting. I did know that a chickens lower eyelid was used to close their eye but I didn't think about other birds and I didn't have any knowledge of the nicititating membrane. Thanks Raddang for asking and thanks for answering Kildale.
Thanks for that Kildale. I didn't think to Google it, just a little surprised when I saw the eye membrane in the original pic of the whole bird.
