When looking at American Dippers I often saw the birds
displaying what I thought was a white nictitating membrane.
These are extra eyelids that many animals, including dippers
have. Some are clear and some opaque. But to me this “membrane”
looks pretty rough. After doing some research I realized that
they actually have white eyelids. And this is what many
observers mistake for nictitating membranes. When the eye is
open the white feathers dissapear, or are only partly visible.
The actual nictitating membrane is clear and only observable at
close range. Welcome to Vancouver Island Nature Tours Thank you
for taking the time to visit my blog! Take a second to peak
around and check out some of my previous posts. Of course, I
would love to find out what you think as well, so make sure to
comment. See you around!