We received a State Wildlife Grant from the Oklahoma Department of Wildlife Conservation. The three year grant will allow us to reevaluate the status and distribution of over a dozen tier-listed fish and crayfish species in the Ozark region of Oklahoma. A key component of the study is to analyze historic changes in distributional patterns of individual species using ecological niche modeling. Among other things, this grant will provide support for a graduate student and create research opportunities for undergraduate students interested in fish ecology.