Yesterday morning I walked with round the Reading University lakes with Zoe. On the large lake there were still a few shoveller ducks under the bushes on the north side. We also saw three brown headed grey ducks which I hadn't seen before. Their backs were light grey and their side an even lighter grey. On getting back home I was able to tentatively identify them as common pochards (Aythya ferina).
We saw one of them yesterday, in with a group of shoveller ducks.