English: Gerhard Heilmann's comparative illustrations, redrawn from William Beebe's illustrations, of the hindlimbs of various immature birds and one reptile: four-day old squab of white-winged dove (1), detail of same showing pelvic wing (2), squabs of domestic pigeon, four days old (3) and a few days older (4), pheasant nestling (5), squab of shag (6), green woodpecker hind-limb (7), and fringed gecko (8).
Date
Source
The Danish book Vor Nuvaerende Viden om Fuglenes Afstamming
The author died in 1946, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 75 years or fewer.
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|Description = Gerhard Heilmann's comparative illustrations of the hindlimbs of various immature birds and one reptile: four-day old squab of white-winged dove (1), detail of same showing pelvic wing (2), squabs of domestic pigeon, four
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