male ferruginous duck (aythya nyroca) swimming in a lake at pacsmag natural reserve

animal appearance aquatic aythya beak behavior bill bird chestnutbrown contrasting dark dense display distinguished diving duck ducks europe eyes face ferruginous found freshwater goose greenishblack lake lakes male males mallard marshes mediumsized natural nature nyroca pacsmag pale plumage pond preference reflection reserve rich sea seabird shorebird southern species striking swan swimming temperate vegetation water waterbird waterfowl wildlife wing