My research programme involves using bats to explore the interfaces between animal behaviour, ecology and evolution. My research, and that of my graduate students, involves different aspects of the biology of bats. The diversity of bats includes morphology, social organization and foraging behaviour. In any of these areas, echolocation appears to have a profound effect and extends the work to sensory ecology, communication and community structure. The communicative aspects of echolocation involve both inter- and intraspecific situations. We also have tried to overtly address the implications of the research for conservation. In my laboratory, we use a combination of field and laboratory experiments and observations in settings ranging from different locations in Canada to a variety of sites in the tropics and subtropics.