Sunday, February 26, 2017

NIctitating Membrane of a little blue heron

Normally I don't pay attention to eyes - but I was in my kayak and a little blue heron was perched near me.  I took a bunch of photos.  When I got home, I thought I had a focus problem because sometimes the eyes were dull and other times - quite clear,  I saw one where the eye was half blurred - so I did a google search on bird eye membrane - and sure enough, there was a nice group of references to the nictitating membrane.  Here are the photos:

The nictitating membrane over the eye - closes left to right

Without nictitating membrane

About 1/4 closed

Looking at me

Looking left

I think this is a yawn

Looking at me

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