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, flattened bills, and feathers that are excellent at shedding water due to an oily coating. Bar-headed goose, Anser indicus (A) Snow goose, Anser caerulescens (A) Graylag goose (grágás), Anser anser Greater white-fronted goose (korngás), Anser albifrons Taiga bean-goose, Anser fabalis (A) Tundra bean-goose, Anser serrirostris (A) Pink-footed goose (íslandsgás), Anser brachyrhynchus Brant (helsigás), Branta bernicla Barnacle goose (øshvít gás), Branta leucopsis Cackling goose, Branta hutchinsii (A) Canada goose, Branta canadensis (I) Mute swan (knubbsvanur), Cygnus olor (I) Tundra swan, Cygnus columbianus (A) Whooper swan (svanur, okn), Cygnus cygnus Common shelduck, Tadorna tadorna (A) Wood duck, Aix sponsa (A) Mandarin duck, Aix galericulata (A) Garganey, Spatula querquedula (A) Blue-winged teal, Spatula discors (A) Northern shoveler, Spatula clypeata (A) Gadwall, Mareca strepera (A) Eurasian wigeon (ennigul ont), Mareca penelope American wigeon, Mareca americana (A) Mallard (villdunna), Anas platyrhynchos American black duck, Anas rubripes (A) Northern pintail (stikkont), Anas acuta Green-winged teal (krikkont), Anas crecca Common pochard, Aythya ferina (A) Ring-necked duck, Aythya collaris (A) Ferruginous duck, Aythya nyroca (A) Tufted duck (trøllont), Aythya fuligula Greater scaup, Aythya marila (A) Lesser scaup, Aythya affinis (A) Steller's eider, Polysticta stelleri (A) King eider (æðukongur), Somateria spectabilis (A) Common eider (æða), Somateria mollissima Harlequin duck, Histrionicus histrionicus (A) Surf scoter, Melanitta perspicillata (A) Velvet scoter, Melanitta fusca (A) White-winged scoter, Melanitta deglandi (A) Common scoter (kolont), Melanitta nigra Long-tailed duck (ógvella), Clangula hyemalis Common goldeneye (súgont), Bucephala clangula Barrow's goldeneye (íslendsk súgont), Bucephala islandica (A) Smew, Mergellus albellus (A) Hooded merganser, Lophodytes cucullatus (A) Common merganser (tannont), Mergus merganser (A) Red-breasted merganser (toppont), Mergus serrator Pheasants, grouse, and allies Order: GalliformesFamily: Phasianidae These are terrestrial species of gamebirds, feeding and nesting on the ground. They are variable in size but generally plump, with broad and relatively short wings. Willow ptarmigan, Lagopus lagopus (I) Rock ptarmigan, Lagopus muta (I) Black grouse, Lyrurus tetrix Common quail (vaktil), Coturnix coturnix (A) Grebes 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. Little grebe (smágjør), Tachybaptus ruficollis (A) Pied-billed grebe, Podilymbus podiceps (A) Horned grebe (gjør), Podiceps auritus Red-necked grebe, Podiceps grisegena (A) Great crested grebe,