ornithological

Dipper eating aquatic invertebrate

Grey wagtail Motacilla cinerea breeding male stood on a mossy stone in a stream

Group of domestic ducks and geese including the Muscovy duck

Hen Gallus gallus domesticus egg sitting in a green field with meadow flowers and butterflies, used for packaging

Edier duck Somateria mollissima pair with chicks in rainy coastal scene male swimming

Herring gull Larus argentatus eating a chip from the road in a seaside urban setting

Goldcrest Regulus regulus upside down on some dried twigs showing the yellow head crest clearly

House martin Delichon urbicum coming to feed chicks in a nest under the eaves of a roof, small vignette

Golden eagle Aquila chrysaetos

Goldfinch Carduelis carduelis pair perched on teasels

Goosander or Common merganser Mergus merganser on a lake with sundew, rocks and a beach in the foreground, scrubby vegetation behind, set in northern Wales uplands.

Goshawk Accipiter gentilis looking fierce cut to white

Great crested grebe Podiceps cristatus male with erect crest

Great spotted woodpecker Dendrocopos major on side of a tree, ready to drill for insects

Stylized diagram of the development of a duck egg from being laid until after hatching day five embryo separates from the yolk, blood vessel network grows and branchesm eye starts to get a colour.

Stylized diagram of the development of a duck egg from being laid until after hatching day eight blood vessels carry waste and oxygen, eyelids start to cover eye, beak and egg tooth more clear.

Common Goldeneye Bucephala clangula male displaying

Stylized diagram of the development of a duck egg from being laid until after hatching duckling hatching half in half out of shell with prominent egg tooth

Common kingfisher Alcedo atthis with minnow in its beak, perched on a branch

Stylized diagram of the development of a duck egg from being laid until after hatching hatched duckling chick

Common sandpiper Actitis hypoleucos sketch cut to white

Bird bone cross section showing cross bracing for strength and hollow structure

Common wood pigeon Columba palumbus showing pink and green feathers

Stylized diagram of the internal organs and anatomy of a duck within a pen outline