We went on the train to Devil's bridge & back yesterday. Shortly out of Aber there was a flock of what appeared to be mainly black-headed gulls, but getting a much better view on the way back there were med gulls mixed in too. A bit further along there were 12+ kites over one field with 8 on the ground at once.
We also saw an otter in the river further up the valley from the dam. Good sighting from quite a good height above!