Diving ducks in the park

As far as waterfowl, the pond has Canada Geese pretty much year round and Mallards often. It always gets our interest when we have a lone visitor of another species. Over the past month, one such visitor we have tentatively identified as a Lesser Scaup. We have watched her many times but have been disappointed with our photo attempts. This is the best of the group:

Today, I spotted another diving duck, and this appears to be a Ring-necked Duck, a type which has visited the pond before in late winter and spring.