Menard, T. (2001) Activity patterns of the Hawaiian hoary bat (Lasiurus cinereus semotus) in relation to reproductive time periods. MSc Thesis, University of Hawaii.
Abstract
I investigated the activity patterns of the endangered Hawaiian hoary bat over a broad geographical and altitudinal range on the island of Hawaii. I found seasonal variation in the timing of emergence. However, in general, bats emerged early in the evening. Also, patterns of temporal occurrence suggested that bats migrate three times a year. First, during the breeding period, bats seem to move out of the eastern highlands and into the lowlands. Second, during the post-lactation period, bats seem to make a partial migration into the eastern highlands and perhaps the central highlands. Third, during the pre-pregnancy period, bats seem to move out of the lowlands and possibly the central highlands and into the eastern highlands. Analysis of gender data from various sources suggested that both sexes occupy the lowlands during the breeding period and that males move out of the lowlands and into the highlands in the post-lactation period.