If you look at the swan on the right, it seems to have something around it neck. Any ideas?
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The yelllow 'thing' on the neck is a neck collar - it is like a colour ring, but on the neck. It is used as swan legs are often underwater or in long grass and colour rings can be difficult to read.
It should have three letters/digits on it. If you can read these on any of your photos you should report the sighting. See
Lat/Lng: 57.6812, -3.2815
OS grid ref: NJ236664