External insulation available to a non-nesting mammal, the little brown bat (Myotis lucifugus)

摘要: Abstract 1. Cooling curves of dead little brown bats (Myotis lucifugus) were used to generate values conductance and insulation under a variety conditions. 2. Insulation increased by 30% when the animals placed in wooden roost; clustering with six other raised 103%, but within roost total available 258%. 3. Bats on periphery cluster seven cooled at same rate as located center. 4. Small cavities (150 300ml) provided 28% more solitary than did large (900ml) cavity.