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Yellowstone Wolf: Project Citizen Science

Yellowstone's wolf packs—Cougar Creek Pack

This pack formed during spring 2001 when a female from the Leopold pack (151F) dispersed and joined up with 2 wolves of unknown origin. Wolf 151F became the long-standing alpha female until she was injured in spring 2008, likely during an elk or bison hunt, and died in the fall of the same year at an impressive age of 10 years old. Genetics data identified 303M as the alpha male and primary breeder during 151F's tenure. The pack persisted as 478F (daughter of the previous alphas) bred with a dispersing male from the Gibbon Meadows pack (689M). This alpha pair had all black pups in 2011, resulting in an atypical pack structure where every wolf was black. More recently, the pack has acquired several gray wolves again. Scat analysis and aerial flights have shown that wolves in this pack primarily consume bull elk year-round and supplement their diet with beaver in the summer and bison in the winter. [Updated 4/2015]



Pack composition

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Description
478FAlphaAdultBlackFemale13Uninfected2003Cougar Creek Pack478F is a black wolf with a white face, legs, and feet. As of March 2015, she has been spending time away from the main pack, so it is not clear whether she remains the alpha female.
953FSubordinateAdultGrayFemale3Uninfected2013Cougar Creek Pack
No ID yetSubordinateAdultBlackUnknown?Uninfected
No ID yetSubordinateAdultBlackUnknown?Uninfected
No ID yetSubordinateAdultBlackUnknown?Uninfected
No ID yetSubordinateAdultBlackUnknown?Uninfected
No ID yetAlphaAdultBlackUnknown1Uninfected2015This large male is likely the new alpha male.
No ID yetSubordinateAdultGrayUnknown12015


14 photos for this pack