Little Penguin (skeleton, with skin of wings and feet intact, and tail feathers and preen gland left attached)
The skeleton of a budgerigar
Eurasian Buzzard (skin removed but flight feathers left attached)
Great Cormorant (skin removed, except from left foot)
Japanese Bantam (feathers removed). The shortened leg and wing bones are the result of the same genetic mutation that gives us Dachshunds.
The head of a Dodo
Red-and-green Macaw (skin removed)
European Robin (skin removed)
Southern Screamer (skeleton)
Great Spotted Woodpecker (skeleton)
The Unfeathered Bird
As this gallery shows, there's a lot more to a bird than just feathers.
Katrina van Grouw's The Unfeathered Bird is an illustrated book on bird anatomy that offers a unique glimpse beneath a bird's feathery surface. Each illustration is meticulously drawn from an actual specimen, so the book is scientifically accurate as well as being beautiful to look at.
The Unfeathered Bird contains over 300 drawings in total, so this gallery is just a small snapshot of van Grouw's avian compendium. Published by Princeton University Press, the book is out now.