May 8th – On the canal at Walsall Wood in steady rain, an interesting group of mallard crossbreed ducks, which I think are fed and loosely tended by a household near the water. I notice there’s mallard in there, of  course, but also white ducks and the one with the grey/blue bill suggests a ruddy duck is somewhere in that one’s genes.

That’s the thing about ducks, they’ll freely interbreed…