For references to literature on bird-migration, the list under the notes to "Bob, the Vagabond," may be used.
GAVIA OF IMMER LAKE
Gavia immer, the Loon.
The Bird (Beebe). "Hesperornis—a wingless, toothed, diving bird, about 5 feet in length, which inhabited the great seas during the Cretaceous period, some four millions of years ago." (Legend under colored frontispiece.)
Life Histories of North American Diving Birds (Bent), pages 47-60.
Bird Book (Eckstorm), pages 9-13.
By-Ways and Bird-Notes (Thompson), pages 170-71. "The cretaceous birds of America all appear to be aquatic, and comprise some eight or a dozen genera, and many species. Professor Marsh and others have found in Kansas a large number of most interesting fossil birds, one of them, a gigantic loon-like creature, six feet in length from beak to toe, taken from the yellow chalk of the Smoky Hill River region and from calcareous shale near Fort Wallace, is named Hesperornis regalis."
Educational Leaflet No. 78. (National Association of Audubon Societies.)
If twenty years of undisputed possession seems long enough to give a man a legal title to "his" land, surely birds have a claim too ancient to be ignored by modern beings. Are we not in honor bound to share what we have so recently considered "ours," with the creatures that inherited the earth before the coming of their worst enemy, Civilization? And in so far as lies within our power, shall we not protect the free, wild feathered folk from ourselves?