ajohn

I wonder whether mergansers may be wintering in Deep Bay, but far offshore from HK. I visited Shenzhen earlier this winter and saw reasonably large numbers of Coot and Tufted Duck, together with a few Greater Scaup and Common Pochard. It seems these diving duck are wintering in the bay but are seen less from this side of the bay. Maybe siltation has made the HK coast too shallow for diving duck?