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Ken Logan
Ken Logan

​​​​​​Wildlife Researcher, Carnivores 

Current or Recent Research Projects

Areas of Interest, Expertise

My research focuses on puma biology, ecology, population dynamics,

behavior, and social structure; how pumas interact with their prey; how pumas interact with people; how people view and act towards large carnivores; development of puma management strategies.

More Specifically - Mountain lions unlock nature’s secrets.
I wanted to be a wildlife researcher essentially to learn how nature works. Secondly, I wanted to provide reliable information about nature to wildlife managers and the public to inform better decisions about managing and conserving nature. It just so happened in the three decades of my career that the mountain lion has been my direct path to nature. My research on mountain lions has included: dynamics and demographics of both non-hunted and hunted populations, behavior and social organization, effects of predation on mule deer and bighorn sheep, behavior in relation to human outdoor recreation activity, habitat use, diseases, and population genetics. I have studied mountain lions in Wyoming, New Mexico, California, and Colorado. My research has included two 10-year studies in New Mexico and Colorado in which I experimentally manipulated mountain lion populations to investigate biological and ecological processes. My latest such study examined the effects of hunting on a mountain lion population in Colorado.

Select Publications

  • Logan, K. A., and J. P. Runge. 2020. Effects of hunting on a puma population in Colorado. Colorado Parks and Wildlife Technical Publication No. 54. Denver, CO, USA
  • Logan, K. A. 2019. Puma population limitation and regulation: What matters in puma management? Journal of Wildlife Management 83:1652-1666.
  • Logan, K. A. 2012. Structuring felid management for science. Wild Felid Monitor. 5:11-14.
  • Logan, K. A., and L. L. Sweanor. 2001. Desert Puma: Evolutionary Ecology and Conservation of an Enduring Carnivore. Island Press, Washington, D. C.
  • Logan, K. and L. Sweanor. 2010. Behavior and social organization of a solitary carnivore. Pages 105-117 in Cougar: Ecology and conservation, M. Hornocker and S. Negri, editors. University of Chicago Press, Chicago.
  • Logan, K. A., L. L. Irwin, and R. Skinner. 1986. Characteristics of a hunted mountain lion population in Wyoming. Journal of Wildlife Management 50:648-654.
  •  Sweanor, L. L., K. A. Logan, and M. G. Hornocker. 2000. Cougar dispersal patterns, metapopulation dynamics, and conservation. Conservation Biology 14:798-808.
  •  Sweanor, L. L., K. A. Logan, J. W. Bauer, B. Millsap, and W. M. Boyce. 2007. Puma and human spatial and temporal use of a popular California state park. Journal of Wildlife Management 72:1076-1084.
  •  Sweanor, L., and K. Logan. 2010. Cougar-human interactions. Pages 190-205 in Cougar: Ecology and conservation, M. Hornocker and S. Negri, editors. University of Chicago Press, Chicago.
  •  Sweanor, L. L., K. A. Logan, and M. G. Hornocker. 2005. Puma responses to close approaches by researchers. Wildlife Society Bulletin 33(1):1-9.
  • Beck, T., J. Beecham, P. Beier, T. Hofstra, M. Hornocker, F. Lindzey, K. Logan, B. Pierce, H. Quigley, I. Ross, H. Shaw, R. Sparrowe, and S. Torres. 2005. Cougar management guidelines: First edition. WildFutures, Bainbridge Island, Washington.
  • Mattson, D., K. Logan, and L. Sweanor. 2011. Factors governing risk of cougar attacks on humans. Human-Wildlife Interactions 5:135-158.
  • Lewis, J. S., K. A. Logan, M. W. Alldredge, L. L. Bailey, S. VandeWoude, K. R. Crooks. 2015. The effects of urbanization on population density, occupancy, and detection of wild felids. Ecological Applications 25:1880-1895.
  • Lewis, J. S., K. A. Logan, M. W. Alldredge, D. M. Theobald, S. VandeWoude, and K. R. Crooks. 2017. Contact networks reveal potential for interspecific interactions of sympatric wild felids driven by space use. Ecosphere 8(3):e01707. 10.1002/ecs2.1707.
  • Lewis, J. S., K. A. Logan, M. W. Alldredge, S. Carver, S. N. Bevins, M. Lappin, S. VandeWoude, and K. R. Crooks. 2017. The effects of demographic, social, and environmental characteristics on pathogen prevalence in wild felids across a gradient of urbanization. PLoS One 12(11): e0187035.
  • Moss, W. E., M. W. Alldredge, K. A. Logan, and J. N. Pauli. 2016. Human expansion precipitates niche expansion for an opportunistic apex predator (Puma concolor). Scientific Reports 6:39639 DOI:10.1038/srep39639.
  • Reynolds, J. J. H., S. Carver, M. W. Cunningham, K. A. Logan, W. Vickers, K. R. Crooks, S. VandeWoude, and M. E. Craft. 2018. Feline immunodeficiency virus in puma: Estimation of force of infection reveals insights into transmission. Ecology and Evolution DOI:10.1002./ece3.5584.
  • Trumbo, D. R., P. E. Salerno, K. A. Logan, M. W. Alldredge, R. B. Gagne, C. P. Kozakiewicz, S. Kraberger, N. M. Fountain-Jones, M. E. Craft, S. Carver, H. B. Ernest, K. R. Crooks, S. VandeWoude, and W. C. Funk. 2018. Urbanization impacts apex predator gene flow but not genetic diversity across an urban-rural divide. Molecular Ecology DOI:10.1111/mec.15261.
  • Reichard, M. V., K. Logan, M. Criffield, J. E. Thomas, J. M. Paritte, D. M. Messerly, M. Interisano, G. Marucci, and E. Pozio. 2016. The occurrence of Trichinella species in the cougar Puma concolor couguar from the state of Colorado and other regions of North and South America. Journal of Helminthology DOI:10.1017/S0022149X16000262.


  • Ph.D., Wildlife Sciences — University of Idaho, 2001
  • M.S., Zoology and Physiology — University of Wyoming, 1983
  • B.S., Range and Wildlife Management — Texas A&I University, 1979
  • Current or Recent Positions

    • Wildlife Researcher — Colorado Parks and Wildlife, 2003-Present
    • Research Biologist — University of California, Davis, Wildlife Health Center, 2001-2003
    • Carnivore Ecologist — The Hornocker Wildlife Institute, 1985-2001