2007 Data At the end of 2007, at least 171 wolves in 11 packs and various groups occupied Yellowstone National Park (YNP). There were fewer packs than in 2006, but the remaining packs were larger and there were more non-pack wolves (e.g., loners, temporary pairs, etc.). This represents a 26% increase from 2006 and closely matches the population peak of 174 in 2003. Ten packs counted toward the breeding pair objective for the Yellowstone Recovery Area; the Hayden Valley pack lost both breeders late in the year and did not count. One new pack, the Gardner’s Hole pack, formed but did not survive until the end of 2007 (despite producing pups). This was the first year since reintroduction that no new packs formed. One radio collared wolf from Idaho dispersed into the park in late 2007. For more information read the Yellowstone Wolf Project - Annual Report, 2007 (1.7 MB pdf).
2007 Yellowstone National Park Wolf Map Territories
Yellowstone National Park 2007 Official Wolf Population Count
The Yellowstone Park Foundation raises money each year to help support Yellowstone's Wolf Project. They are a non-profit organization whose mission is to fund projects and programs that protect, preserve and enhance Yellowstone National Park.
Did You Know?
There were no wolves in Yellowstone in 1994. The wolves that were reintroduced in 1995 and 1996 thrived and there are now over 300 of their descendents living in the Greater Yellowstone Area.