Though commonly mistaken for ducks, American coots are only distantly related to ducks, belonging to a separate order, the family Rallidae.

Noisier and more quarrelsome than their relatives, the rails, American coots are known for their unmelodic medleys of cackles, grunts, and croaks. The young have a remarkable means of escaping danger: at the first warning from an adult, chicks dive underwater and grasp a plant stem in their bill, anchoring themselves to the bottom until the threat has passed.