This data set provides the locations and corresponding elevations where insect collection, acoustic recording, or Hawaiian hoary bat (Lasiurus cinereus semotus) captures occurred as part of a study of bat activity, diet, and prey availability in the Waihou Mitigation Area, Maui. To fulfill requirements for mitigating bat fatalities under it's approved incidental take permit, Auwahi Wind Energy LLC (Auwahi Wind) provided funding for research of Hawaiian hoary bat ecology. Data from this study were collected to assess bat habitat use, diet, prey availability and foraging ecology in a restoration area created for bat habitat mitigation. We surveyed bat acoustic activity and foraging activity over a three-year period for a baseline observation of bat detection frequency and seasonal patterns. Insects were collected in two different seasons to describe the abundance and diversity of potential bat prey items in the restoration area. Bats were captured during the same periods to collect guano for dietary analyses. Please reference the associated metadata and datasets that correspond to this publication for more information on how these locations were used.