The other day I counted over 90 pale bellied brent geese on the salt marsh at RSPB Loch Gruinart. Some of these were ringed birds which I was able to take a reading of and send away to the appropriate people:
http://irishbrentgoose.blogspot.co.uk/
Click on this link to the Irish brent goose project for details of a family I identified; these birds were caught and rung in Axel Heiberg Island, Canada, in July (with the use of a helicopter!). This is around 2,500 miles, and Islay isn't even their final destination.
Others that were rung in the group included one that had already made its journey to Stranford Lough a fortnight ago, and is apparently known for yo-yoing between sites! Information from these rings can tell us a great deal about migrating birds movements which we would be otherwise unaware of.
Apologies for the lack of photos, unfortunately I'm not in the habit of taking the camera. However, we are counting again today so I will try to take some then.