. The Canadian field-naturalist. Natural history. 2001 Hutchinson and Lacki: Roost Site Selection in the Red Bat 207 Table 1. Means and standard errors (SE) of temperatures (°C) within roosting sites of Red Bats, Lasiurus borealis, and exposed sites in the habitat in mixed mesophytic forests, Kentucky, 1997. Temperature profile Roosting ; sites Mean + SE ± ; ± ± ± ; ± ; ± ± ± ; ± ± ± ± Exposed sites Mean + SE Overall Minimum Maximum Variance Diurnal
. The Canadian field-naturalist. Natural history. 2001 Hutchinson and Lacki: Roost Site Selection in the Red Bat 207 Table 1. Means and standard errors (SE) of temperatures (°C) within roosting sites of Red Bats, Lasiurus borealis, and exposed sites in the habitat in mixed mesophytic forests, Kentucky, 1997. Temperature profile Roosting ; sites Mean + SE ± ; ± ± ± ; ± ; ± ± ± ; ± ± ± ± Exposed sites Mean + SE Overall Minimum Maximum Variance Diurnal Minimum Maximum Variance Nocturnal Minimum Maximum Variance "Means within rows are different (P < ). Lewis (1995) proposed that foliage roosting bats have the benefit of alternative roosting sites and, because of greater roost site availability, have easy access to alternate roosting sites that offer different microclimates. Vaughan (1987) observed Yellow- winged Bats, Lavia frons, in Africa switching roost locations in accordance with temperatures, always choosing roosting sites in dense shade during the day in warm weather while moving to the open during cooler periods. Although the Red Bats in this area switched roosts frequently (about every days; Hutchinson and Lacki 2000), they were most com- monly observed in diurnal roosts motionless with their wings folded around their body. Others observed Red Bats in diurnal roosts in apparent tor- por and also stretching and grooming (McClure 1942; Orr 1950; Mumford 1973). Licht and Leitner (1967) suggested that reduced metabolic rates through inactivity appear to be important in reducing heat stress of bats in high tem- peratures. Tree bats are believed to maintain lower metabolism rates in order to conserve energy while in torpor when ambient temperatures are high (McNabl974
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