One thing I look forward to during the approach of cold weather is the return of the Mergansers to inland lakes and rivers. The Hooded Mergansers have a nice contrast of color and do like to dive.
The larger Common Merganser is a little less flashy and lack the hood but one thing they share with their smaller cousins is that they too, like to dive. Both of them add a visual warmth to an otherwise cold, dreary lake.