Merganser and Duck Descriptions in Ornithology Text
The eighth merganser is a middle sized diving bird with black green glossed head and back white lower body yellowish breast grey tail red eyes feet and bill. It feeds by diving and stores air for respiration underwater. The passage notes seven merganser types, forty five described duck species, and Buffon’s divisions of swan goose and duck. It also discusses the kingly swan and its gentle rule over waterfowl and the tame swan kept as pond ornaments.