Migratory Grasshopper, Melanoplus sanguinipes

The Migratory Grasshopper occurs thoroughout the United States and southern Canada, in weedy, disturbed environments. A significant crop pest, this species migrates en masse when the population density increases.

I photographed these grasshoppers on Blue Mountain and Hurricane Hill in Olympic National Park in mid September 2008. Image 5 shows a mating pair and 6 shows a nymph.