Thanks for your comments everyone. I agree with you about the rings don't see the need for some to have as many as 5 or 6 on and quite a lot of them had them. There didn't seem as many Avocets about at Titchwell this year as there was last year, maybe due to the work that has been going on, and they weren't close enough to get decent shots so I went to the next village of Thornham and took all of these in the channels that led out to the sea.