February and increased their crowing at a similar rate during both years. The highest intensity of crowing occurred on April 5 in 1958 and on April 17 in 1959. Daily crowing intensity was highest from 45 to 15 minutes before sunrise, and it declined progressively during two subsequent '/2-hr periods. Variation in frequency of crowing among individual cocks was highly significant; one bird crowed 44 times, another crowed 494 times during the same observavation period. REFERENCES CITED FEDERER, W. T. 1955. Experimental design. The Macmillan Co., New York. 544pp. KIMBALL, J. W. 1949. The crowing count pheasant census. J. Wildl. Mgmt., 31(1): 101-120. KLONGLAN, E. D. AND E. L. KOZIcKY. 1953. Variations in two spring indices of male pheasant populations. Story County, Iowa. Proc. Iowa Acad. Sci., 60:660-664. MCCLURE, H. E. 1944. Censusing pheasants by detonations. J. Wildl. Mgmt., 8(1):61-65. NOMSEN, R. C. 1953. Crowing cock count. Proc. Iowa Acad. Sci., 60:700-706. Received for publication January 23, 1962.