Dennis Wasko
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Dennis Wasko


At Hillyer, I get to not only work with interesting students, but get to really know them. I look forward to passing on my love of science, nature, and learning in general, as well as sharing some of the incredibly fun and rewarding experiences to which those interests have often led.


  • BYB 201: Environmental Science
  • BYB 210: General Biology I
  • BYB 211: General Biology II

Degrees and Certifications

  • Ph.D. University of Miami
  • M.S. Sam Houston State University
  • B.S. Rowan University

Research Interests

  • Herpetology
  • Spatial ecology
  • Feeding ecology
  • Vertebrate natural history

Selected Publications 

  • Wasko, D.K. and M. Sasa. 2010. Habitat selection of the fer-de-lance (Bothrops asper, Serpentes: Viperidae) in lowland rainforest in Costa Rica. Herpetologica (in press)
  • Sasa, M., D. K. Wasko, and W. W. Lamar. 2009. Natural history of the terciopelo Bothrops asper (Serpentes: Viperidae) in Costa Rica. Toxicon 54: 904-922
  • Wasko, D.K. and J. Losos. 2009. Bothrops asper aggressive behavior. Herpetological Review 40: 94
  • Wasko, D.K. and M. Sasa. 2009. Activity patterns of a Neotropical ambush predator: spatial ecology of the fer-de-lance (Bothrops asper, Serpentes: Viperidae) in Costa Rica. Biotropica 41(2): 241-249
  • Wasko, D.K. and D. Roberts. 2008. Boa constrictor diet. Herpetological Review 39(4): 466
  • Lutterschmidt, W.I. and D.K. Wasko. 2006. Seasonal activity, relative abundance, and population structure of the American alligator (Alligator mississippiensis) in a small and highly disturbed lake. Southwestern Naturalist 51: 346-351