Mountain goats are a key species in the alpine tundra in Kluane National Park and Reserve. The potential impacts of climate change on snow depth, the frequency of rain-on-snow-events and the position of altitudinal treeline may influence goat foraging, predator dynamics and thus the survival rates of goats. Aerial survey counts of total goats (all adults and young of year) within a defined survey area on Goatherd Mountain have occurred approximately every two years since 1977. Surveys are performed in mid to late-July from a helicopter.