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Understanding the relationship between species distributions and their underlying mechanisms is a major question in ecology and evolutionary biology as well as a major tenet in my academic pursuits. The mechanisms involved and the degree to which they affect distributions vary among species and within a species’ range. I have been examining the diversity of these mechanisms through behavioral, physiological, and integrative approaches. This approach has allowed me to further my knowledge of the evolution of such traits and the maintenance of biodiversity and geographic distributions. Determination of these mechanisms is also important for future research that involves mechanistic modeling that explain current distributions and studies that attempt to explain future distributions. The latter is of particular importance because of future predictions of global climate change.