English: Pronghorn antelope (Antilocapra americana) drinking water on playa in SW Idaho Snake River Plains. This was the only water source for miles around and only was available after a rain, but the clay of the playa holds even a little bit of water that may fall. Though maps of the Snake River plains tend to show abundant streams, this is optimistic thinking on the part of land developers for the most part, and most streams shown on maps are dry streambeds.