1883. An unrecorded habit of the red-headed woodpecker. Ornithologist and Oologist, vol. 8, p. 56.
Kennard, Frederic Hedge.
1895. January occurrence of the “sapsucker” in Brookline, Mass. Auk, vol. 12, pp. 301-302.
King, Franklin Hiram.
1883. Economic relations of Wisconsin birds. Geology of Wisconsin, Survey of 1873-1879, pp. 441-610.
Klugh, A. B.
1909. A remarkable migration of yellow-bellied sapsuckers. Ottawa Nat., vol. 23, pp. 115-116.
Knight, Ora Willis.
1908. The birds of Maine.
Kopman, Henry Hazlitt.