Checking the ducks on the river at Chatsworth this morning one duck in a group of 6 Tufted looked distinctly odd. I think this is the product of a male Pochard and female Tufted Duck. These hybrids occasionally lead to claims of Lesser Scaup but there are some clear differences shown in these photos. Lesser Scaup (follow this link to photos of the bird last year at Ogston) only has the nail of the bill black and the back is more distinctly vermiculated. Also the eye looks orange rather than yellow which makes me think this is the offspring of a male Pochard. Several Crossbill in the larches by the second weir and a pair of Gooseander were the only other birds of note.