House martin Delichon urbicum and nest vignette
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 Goldeneye Bucephala clangula male displaying
Common kingfisher Alcedo atthis
Common kingfisher Alcedo atthis with minnow in its beak, perched on a branch
Common sandpiper Actitis hypoleucos
Common sandpiper Actitis hypoleucos sketch cut to white
Common wood pigeon Columba palumbus
Common wood pigeon Columba palumbus showing pink and green feathers
Comparison of egg sizes
Pencil sketch comparing size of humming bird, ostrich, hen, and elephant bird
Coot Fulica atra
Coot Fulica atra
Corncrake Crex crex
Corncrake Crex crex standing on a large stone looking alert with grass at its feet
Cuckoo Cuculus canorus
Cuckoo Cuculus canorus
Curlew Numenius arquata
Curlew Numenius arquata
Dabchick pair Tachybaptus ruficollis
Dabchick or Little grebe pair Tachybaptus ruficollis
Diagram of a duck skeleton
Stylized diagram of the skeelton of a duck
Diagram of Duck Egg development Day 1
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
Diagram of Duck Egg development Day 12
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
Diagram of Duck Egg development Day 27
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
Diagram of Duck Egg development Day 5
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.
Diagram of Duck Egg development Day 8
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.
Diagram of Duck Egg development Duckling chick hatching out still half in its shell
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
Diagram of Duck Egg development Hatched duckling chick
Stylized diagram of the development of a duck egg from being laid until after hatching hatched duckling chick
Diagram of the cross section of a bird bone
Bird bone cross section showing cross bracing for strength and hollow structure
Diagram of the internal anatomy of a duck
Stylized diagram of the internal organs and anatomy of a duck within a pen outline
American goldfinch Spinus tristis
American goldfinch Spinus tristis quick sketch on twig with red berries
Archeopteryx reconstruction
Archeopteryx reconstruction
Archeopteryx skeleton
Archeopteryx skeleton