Abstract

The cave bat, Myotis velifer incautus (J. A. Allen), long has been known to inhabit the gypsum mines and caves of Barber and Comanche counties in south-central Kansas. In this area, populations of M. velifer range from one or two individuals in some of the smaller caves to an estimated 50,000 to 75,000 individuals in one large gypsum mine. Because of the relative abundance and availability of this species, it is an excellent subject for studies on seasonal movements, seasonal fluctuations in sex ratios, and homing ability. Three important studies of M. velifer in south-central Kansas are those of Hibbard (1934) on distribution, Cockrum (1952) on dispersal of populations, based on a total of 2,000 individuals banded in the spring of 1948, and Twente (1955) who investigated seasonal movements, sex ratios, survival rates, and age composition in 1952 and 1953. A study was initiated by us in August 1963 to gather additional data on the seasonal movements of populations of M. velifer between roosting areas in Barber and Comanche counties. This report discusses the results of that study to April 3, 1966.

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