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Dr. Larry Clark


Dr. Larry Clark
NWRC Director

Dr. Larry Clark became the Director of the NWRC in April 2008. Prior to this position, Dr. Clark served as the Center's Assistant Director and was responsible for managing the NWRC and its field stations, setting internal policies and directives, and promoting collaboration among research programs. Dr. Clark began his career with APHIS in 1991 and during the past 17 years has been instrumental in establishing NWRC's wildlife disease research capabilities. He has extensive research experience studying how animals perceive environmental chemicals. This has been useful in developing lures, repellents, and for understanding constraints on foraging ecology. He has also studied the use of biopharmaceuticals by wildlife and has experience in field and laboratory studies involving: physiological and behavioral temperature regulation and biophysical modeling; studying certain wildlife diseases and pathogens ( E. coli, Salmonella, Campylobacter, Listeria, avian influenza and West Nile virus).


  • Ph.D., University of Pennsylvania, "Biophysical and Physiological Constraints on the Evolution of Parental Care in Altricial Birds"
  • M.S., Northern Arizona University, "Nutritional Constraints and the Development of Endothermy in Pinon Jays"
  • B.S., University of Maryland

International Experience

  • Russia/USSR (reproductive inhibitors, sensory biology)
  • Australia (repellents)
  • United Kingdom (repellents)
  • Israel (repellents)
  • Central Pacific Islands (avian growth, development, temperature regulation, and breeding biology)
  • Canada (pesticides, avian growth and development)

Current Academic Affiliations

  • Monell Chemical Senses Center
  • Graduate Degree Program in Ecology, Colorado State University
  • Dept Conservation, Fisheries and Wildlife, Colorado State University

Contact Information

  • Address: Wildlife Services, NWRC, 4101 LaPorte Ave., Fort Collins, CO 80521
  • Telephone: 267-519-6036
  • Fax: 267-519-4930
  • E-mail:

Selected Publications

Clark, L., C. Clark, and S. Siers. 2018. Brown tree snakes methods and approaches for control. pgs. 107-134. In: W.C. Pitt, J.C. Beasley, and G.W Witmer, editors. Ecology and Management of terrestrial vertebrate invasive species in the United States. CRC Press, Boca Raton, FL. 403 pp.

Edwards, Ryan J., L.C. Clark, and K.G. Beck. 2014. Russian Olive (Elaeagnus angustifolia) dispersal by European starlings (Sturnus vulgaris). Invasive Plant Science and Management 7(3):425-431.  doi: 10.1614/IPSM-D-13-00082.1.

Clark, L., J. Hagelin, and S. Werner. 2014. The chemical senses in birds. In: C. Scanes, editor. Sturkie's Avian Physiology, Sixth edition. Academic Press, Elsevier Inc., Boston, MA. 89-111.

Clark, L. 2014. Disease risks posed by wild birds associated with agricultural landscapes. In K.R. Matthews, G.M. Sapers, and C.P. Gerba, editors. The Produce Contamination Problem, Second edition. Academic Press, Elsevier Inc., Boston, MA. 139-165. doi: 10.1016/B978-0-12-404611-5.00007-5.

Clark, L. and M.L. Avery. 2013. Effectiveness of chemical repellents in managing birds at airports. Pages 25-35 in T.L. DeVault, B.F. Blackwell, and J.L. Belant, editors. Wildlife in Airport Environments: Preventing Animal-Aircraft Collisions through Science-Based Management. The Johns Hopkins University Press, Baltimore, Maryland, in association with The Wildlife Society.

Clark, L., P.J. Savarie, J.A. Shivik, S.W. Breck, and B.S. Dorr. 2012. Efficacy, effort, and cost comparisons of trapping and acetaminophen-baiting for control of brown treesnakes on Guam. Human-Wildlife Interactions 6: 222-236.

Clark, L., and P.J. Savarie. 2012. Efficacy of aerial broadcast baiting in reducing brown treesnake numbers. Human-Wildlife Interactions 6(2): 212-221.

Carlson, J. C., L. Clark, M. F. Antolin, and M. D. Salman. 2011. Rock pigeon use of livestock facilities in northern Colorado: implications for improving farm bio-security. Human-Wildlife Interactions 5:112-122.

Carlson, J. C., R. M. Engeman, D. R. Hyatt, R. L. Gilliland, T. J. Deliberto, L. Clark, M. J. Bodenchuk, and G. M. Linz. 2011. Efficacy of European starling control to reduce Salmonella enterica contamination in a concentrated animal feeding operation in the Texas panhandle. BMC Veterinary Research 7:9 Online



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