Aerial survey units for surveys of Dall's sheep and mountain goats in Wrangell-St. Elias National Park and Preserve. The count areas were originally delineated by Alaska Department of Fish and Game wildlife biologists in 1967 on several USGS 1:250,000 topographical maps to survey (count and classify) Dall sheep (Ovis dalli dalli) and mountain goat (Oreamnos americana) populations. Count areas were designed to cover the mountainous habitat of these animals within WRST and to encompass units of reasonable size for fixed-wing aerial surveys (4-6 hours of effort) using prominent geographical features for boundaries. These units are currently flown in cooperative effort between Alaska Department of Fish and Game and Park biologist. The units were not intended to define discrete populations of sheep or goats.