Jay Mager

Photo of John
Jay Mager
Professor of Biological Sciences
Meyer Hall of Science 155
525 South Main Street, Ada, OH, 45810
Research Interests
The behavioral ecology of birds, and its application to conservation and management.
Employee degree:

BA, Hiram College

MS, Miami University

PHD, Cornell University


Courses Taught:

  • BIOL 1031: Life and Earth Sciences
  • BIOL 1201: Biology I
  • BIOL 1401: Biology II
  • BIOL 2511: Ecology: Theory and Applications
  • BIOL 2901: Special Topics: Natural History & Ecology of New Zealand
  • BIOL 3631: Ornithology
  • BIOL 3661: Environmental Research Methods
  • BIOL 3781: Behavioral Ecology
  • BIOL 3831: Animal Behavior
  • EXDS 2001: A Bird's-eye View of Global Environmental & Human Health


  • Mager, J.N., Wade, B., Abts, S., and J. Paruk. 2022. Foraging patterns vary with degree of sociality among Common Loon (Gavia immer)overwintering on a freshwater lake.  Canadian Field-Naturalist 136: 30-41. doi.org/10.22621/cfn.v136i1.2791
  • Paruk, J.D., Wade, B., Byrd, A., and J.N. Mager. Wintering Common Loons (Gavia immer) exhibit daily social behavior on Lake Jocassee South Carolina. The Wilson Journal of Ornithology 133: 326-333. doi.org/10.1676/20-00089
  • Paruk, J.D., Evers, D.C., McIntyre, J.W., Barr, J.F., Mager, J.N., and W.H. Piper.  2021.  Common Loon (Gavia immer), version 3.0. In The Birds of North America (A.F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://birdsoftheworld.org/bow/species/comloo/cur/introduction)
  • Paruk, J., Chickering, M., Mager, J., Wilkie, S., and R. Espie. 2018.  Initial indications of PAH exposure in Saskatchewan Common Loons.  FACETS  doi: 10.1139/facets-2018-0009.
  • Piper, W.H., Mager, J.N., Walcott, C., Banfield, N., Reinke, A., Spilker, F., and J. Flory.  2015.  Territory acquisition in Common Loons: a strong impact of age but no footholds. Animal Behaviour 104: 155-163.
  • Mager, J.N. and C. Walcott. 2014.  Dynamics of an aggressive vocalization in the Common Loon (Gavia immer): A review.  Waterbirds 37 (Special Publication 1): 37-46.
  • Mager, J.N., Walcott, C., and W.H. Piper. 2012. Male common loons (Gavia immer) signal greater aggressive motivation by lengthening territorial yodels. The Wilson Journal of Ornithology 124: 74-81.

Professional Service: