Differential use of experimental habitat patches by foraging Peromyscus maniculatus on dark and bright nights [1]

To assess the influence of illumination on choice of microhabitat by foraging rodents, we tested the use of exposed and protected patches by deer mice (Peromyscus maniculatus) when seeds were equally available in two or more patch types in large laboratory arenas. Based on field observations, we expected that, under higher levels of illumination, the ratio of foraging activity in exposed microhabitats to that in protected ones would be lower. We present data from three experiments that uphold this expectation