countryside

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

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.

Great crested grebe Podiceps cristatus male with erect crest

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

Great Tit Parus major on a tree branch with grasses behind

Grey heron Ardea cinerea wading ankle deep in a river with reeds behind

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

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

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

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

Common Goldeneye Bucephala clangula male displaying

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

Coot Fulica atra

Cuckoo Cuculus canorus

Curlew Numenius arquata

Dabchick or Little grebe pair Tachybaptus ruficollis

Stylized diagram of the skeelton of a duck

Stylized diagram of the development of a duck egg from being laid until after hatching Day one yolk held in place with chalaza, germinal disc where fertilized chick starts to grow

Stylized diagram of the development of a duck egg from being laid until after hatching day twelve feathers start to show eye covered with lid claws formed

Stylized diagram of the development of a duck egg from being laid until after hatching Day 27 hatchling squashed inside egg ready to hatch, air cell still shows

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.