ornithological

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

Great Tit Parus major on a tree branch with grasses behind

Greater flamingo Phoenicopterus roseus standing on one leg cut to white

Green woodpecker Picus viridis perched on a tree trunk

Grey heron Ardea cinerea quick sketch, standing on one leg in a river

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

Grey partridge Perdix perdix cut to white with one foot raised

Dipper eating aquatic invertebrate

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

Coot Fulica atra

Corncrake Crex crex standing on a large stone looking alert with grass at its feet

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.