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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). 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. Often hard to spot, this pack currently has an old-looking alpha pair. Pup recruitment has been low the past few years. 953F, a large gray female, has historically been with this pack but in April, 2017 her collared was found chewed off. [Updated 4/2017]



Pack composition

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Description
953FSubordinateAdultGrayFemale4Uninfected2013Cougar Creek PackHer collar was found chewed off in January, 2017. We speculate she is still alive and with the pack.
1050FSubordinatePupBlackFemale1Uninfected2016Cougar Creek Pack
1051MSubordinatePupBlackMale1Uninfected2016Cougar Creek Pack1051M's collar malfunctioned within a few weeks of deployment, thus he can be identified by his collar but it does not have a frequency.
No ID yetAlphaAdultBlackFemale?UninfectedGraying
No ID yetAlphaAdultBlackMale2Uninfected2015This large male is likely the new alpha male, already graying
No ID yetSubordinatePupBlackFemale1Uninfected2016Cougar Creek Pack


16 photos for this pack


Past pack members

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Death year Description
478FAlphaUnknownBlackFemale14Uninfected2003Cougar Creek Pack2015478F is a black wolf with a white face, legs, and feet. She died in late 2015 after spending the spring away from the pack.