A desire to maximize the knowledge gained from the emerging study of wind energy/wildlife interactions prompted the National Wind Coordinating Collaborative to publish Studying Wind Energy/Bird Interactions: A Guidance Document (Anderson et al. 1999). As concern over potential impacts to bats emerged as a significant issue for renewable energy, the NWCC supported the publication of Assessing Impacts of Wind Energy Development on Nocturnally Active Birds and Bats: A Guidance Document (Kunz et al. 2007a). Subsequent to the publication of Anderson et al. (1999), much has been learned about the impacts of wind energy development on wildlife and their habitat. In consideration of this increase in knowledge and of new methods and metrics that have been developed, the NWCC published this resource document that expands on Anderson et al. (1999). While Anderson et al. (1999) focused on the study of wind energy impacts to birds, this resource document broadens its focus to include other wildlife, particularly bats. This document provides a review of the available methods and metrics and makes suggestions regarding their application. Notwithstanding, our recommendations should not be considered prescriptive as all sites are unique to some extent, and methods, metrics, and protocols by which they are applied should be adjusted to each individual situation.