List of birds of Olympic National Park  This is a comprehensive listing of all the bird species recorded in Olympic National Park, which is in the U.S. state of Washington. This list is based on one published by the National Park Service (NPS). Since the NPS list was compiled through July 2019, 12 species have been added through eBird. This list is presented in the taxonomic sequence of the "Check-list of North and Middle American Birds", 7th edition through the 60th Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the "Check-list". This list contains 311 species. Unless otherwise noted, all are considered to occur regularly in Olympic National Park as permanent residents, summer or winter visitors, or migrants. The tags below are used to designate the abundance of some species. Some of the species listed by the NPS as not confimed have documented eBird records. Order: AnseriformesFamily: Anatidae  The family Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, bills which are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils. Order: GalliformesFamily: Odontophoridae  The New World quails are small, plump terrestrial birds only distantly related to the quails of the Old World, but named for their similar appearance and habits. Order: GalliformesFamily: Phasianidae  Phasianidae consists of the pheasants and their allies. These are terrestrial species, variable in size but generally plump with broad relatively short wings. Many species are gamebirds or have been domesticated as a food source for humans. Order: PodicipediformesFamily: Podicipedidae  Grebes are small to medium-large freshwater diving birds. They have lobed toes and are excellent swimmers and divers. However, they have their feet placed far back on the body, making them quite ungainly on land. Order: ColumbiformesFamily: Columbidae  Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. Order: CaprimulgiformesFamily: Caprimulgidae  Nightjars are medium-sized nocturnal birds that usually nest on the ground. They have long wings, short legs, and very short bills.