Returning a few days later to see them with sufficient daylight. At their roosting site of a few days ago I found a lot of activity. 10+ Common Mergansers seemed to be having a party. It such a distance it was impossible to distinguish any of them. By the end of the morning they started leaving and this pair came to settle down in their corner.
A crowd of curious Little Grebes, カイツブリ came to watch them