This large-billed, dark Eider caught my attention just as I was leaving Macmillan Wharf. It was feeding entirely alone in open water, frequently diving. The bill appeared huge from most angles, and the frontal bill lobes of this bird appeared to be pointed. The plumage was mostly dark, 'velvety' brown lacking the reddish tones of most of the local dresseri. I'm not sure what to make of the age or sex of this bird, but suspect that sub-specifically, it maybe something other than dresseri.