This one came in reasonably close to shore and didn't seemed bothered that I was there.
The waterborne American Coot is one good reminder that not everything that floats is a duck. A close look at a coot—that small head, those scrawny legs—reveals a different kind of bird entirely. Their dark bodies and white faces are common sights in nearly any open water across the continent, and they often mix with ducks. But they’re closer relatives of the gangly Sandhill Crane and the nearly invisible rails than of Mallards or teal.
source - https://www.allaboutbirds.org/guide/American_Coot/