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Stereographic film, Perry Harrison's sheep
Stereographic film, plant
Stereographic film, trees
Stereographic film, white water lilac
Sternum of Hoatzin, from William Pane Pycraft, "History of Birds"
Stick with Martin's nest
Stillwell baby, Johnnie Stillwell Jr.
Stilt, illustration from Alfred Newton, "A Dictionary of Birds"
Stomach glands of chicken, illustration from William Beebe, "The Bird Its Form and Function"
Stomach of Ducks, shedding of pads, illustration from article by Waldo Lee McAtee in The Auk