An excellent monograph on the wild bird is that by Dr Carl Bolle (Journ.
Bolle's Laurel pigeon: By far the easiest of the two endemic pigeons to find.
For want of space it must here suffice simply to name some of the ornithologists who have elaborated, to an extent elsewhere unknown, the science as regards their own country: Altum, Baldamus, Bechstein, Blasius (father and two sons), Bolle, Borggreve, whose Vogel-Fauna von Norddeutschland (8vo, 1869) contains what is practically a bibliographical index to the subject, Brehm (father and sons), Von Droste, Gatke, Gloger, Hintz, Alexander and Eugen von Homeyer, Ji ckel, Koch, KOnig-Warthausen, Kriiper, Kutter, Landbeck, Landois, Leisler, Von Maltzan, Bernard Meyer, Von der Miihle, Neumann, Tobias, Johann Wolf and Zander.
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