3 Pages in Charles Darwin's Library associated with "fauna - raven"

Essay on the physiognomy of serpents.
By: Schlegel, Hermann.
Publication info: Edinburgh :Maclachlan, Stewart & Co.,1843.
Pages: Page 206 Page 206
Naturgeschichte der Stubenvögel.
By: Bechstein, Johann Matthäus,
Publication info: Halle :Hennemann,1840.
Pages: Page 3