Predators include rough-legged hawks, peregrine falcons, gyrfalcons, snowy owls, and Arctic foxes. Wood frogs have been reported north of the Brooks Range. Arctic char and Arctic grayling are found in most rivers and some of the shallow tundra lakes. Surface Water Characteristics. Many swift streams and rivers occur among the hills, but lakes are infrequent.
Most streams have swift, braided courses across gravel flats.
Streams often freeze solid to their bottoms, causing floods to occur over the surrounding flats. Some thaw lakes are present. Wetlands occupy greater than 83 percent of the area. Occurrence of wildfire is very low. Climate and soils are unsuitable for agriculture.