Grasslands were once a dominant feature of Canada's landscape, extending across most of southern Alberta, Saskatchewan and Manitoba, with smaller expanses in the Yukon, the interior of British Columbia, and in eastern Ontario. Now, virtually all of these grasslands have been extensively modified for agricultural production with only scattered patches left undisturbed. Our current knowledge of grassland arthropods largely is limited to species of economic importance; usually exotic species or native species that have become agricultural pests. There exists relatively little information on the arthropods of native grasslands, such that we know little about their biodiversity, their role in ecosystems, and their ability to respond to habitat change.