10 eggs in a nest, Isle of Islay

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Picture of 10 eggs in a nest of a ground nesting birdI don’t know which bird these are from, all I know it’s a ground nesting bird and the nest was in the Ardnave area. I’m pretty sure they were identified at the time (our walk leader was from the RSPB), but the walk was over 10 years ago and my memory isn’t that good.