The rough-legged buzzard (Europe) or rough-legged hawk is a medium-large bird of prey. It is found in Arctic and Subarctic regions of North America, Europe, and Russia during the breeding season and migrates south for the winter. It was traditionally also known as the rough-legged falcon in such works as John James Audubon's The Birds of America.
Rough-legged buzzard
The tail is white with a dark terminal band.
The feet are feathered.
Egg from the Museum Wiesbaden
The Birds of America is a book by naturalist and painter John James Audubon, containing illustrations of a wide variety of birds of the United States. It was first published as a series in sections between 1827 and 1838, in Edinburgh and London. Not all of the specimens illustrated in the work were collected by Audubon himself; some were sent to him by John Kirk Townsend, who had collected them on Nathaniel Jarvis Wyeth's 1834 expedition with Thomas Nuttall.
The cover shows a Louisiana heron, Egretta tricolor (now called tricolored heron)
Plate 1 by John James Audubon depicting a wild turkey (Meleagris gallopavo).
Carolina parakeet (Conuropsis carolinensis), now extinct
The fourth volume, on display at the National Museum of Natural History