Watching the River

This morning for my early morning drive I decided to check the river first for ducks. I stopped at an observation deck to look for mergansers and first saw one male. Then two males!As I was on the opposite side of the river I wanted to get closer to these ducks so I waited at the bend in the river , just before the highway bridge crossed the river., so I went back to my car and drove to a parking area further down the river where I knew I would be able to watch the ducks when they swam down river. Finally I saw one male coming down the riverThen, I watched it as it hit the rough water under the highway bridge, then I lost sight of it.I sat and waited for more mergansers but I saw no more come around the bend!, but where did they go? While waiting for more ducks I kept hearing an Eastern Phoebe singing.so I decided to check it out. there is an inviting walking path that goes under the bridge so I walked along it. And no, I didn't find the phoebe, but I did find the mergansers! 4 or 5 of them!!!! , in the water under and by the bridge and they immediately took off when they saw me!How had they gotten by without me seeing them?!There was a female among the males, the female does not have a white body as the male mergansers do!