Bats are one of the most diverse and fascinating groups of mammals and occupy a wide range of ecological niches across the planet. Bats are important pollinators and voracious insect predators, providing billions of dollars in estimated agricultural pest control in the United States. Like many species, bats are feeling the pressures of habitat loss, disease, climate change, and other factors. Bats are also susceptible to turbine-related mortality at commercial wind farms and are thus the focus of a lot of discussion and debate related to continued expansion of the wind energy industry. Peterson will summarize the biology and behavior of bats in Maine, introduce some of the tools bat biologists use to study bats, and describe his research on how to minimize risk to bats at commercial wind farms while continuing to generate renewable energy.