Andrew Berdahl

  • Assistant Professor, SAFS
  • Faculty Member, UW QERM Graduate Program

Research areas

I am broadly interested in ecological systems, but currently focus mainly on problems at the interface of collective behavior and movement ecology.  I apply a wide range of techniques (theoretical modeling, numerical simulations, lab experiments and field-work) to explore topics including:

  • collective search, sensing and navigation
  • the role of collective decision making (both spatial and temporal) in animal migration
  • the implications of group-level behaviors on ecological and evolutionary processes
  • the joint evolution of dispersal and local adaptation

Prospective graduate students: Prospective students interested in working in my lab should email me.


  • Q SCI 292:¬† Calculus II
  • Q SCI 497: Agent-based modeling

Areas of Expertise

  • Movement ecology
  • Theoretical ecology
  • Collective movement
  • Ecological modeling
  • Computer vision

Selected publications

  • Berdahl, A., Torney, C. J., Ioannou, C. C., Faria, J. J., & Couzin, I. D. (2013). Emergent sensing of complex environments by mobile animal groups. Science, 339(6119), 574-576.

  • Berdahl, A., van Leeuwen, A., Levin, S. A., & Torney, C. J. (2016). Collective behavior as a driver of critical transitions in migratory populations. Movement ecology, 4(1), 18

  • Berdahl, A., Westley, P. A., Levin, S. A., Couzin, I. D., & Quinn, T. P. (2016). A collective navigation hypothesis for homeward migration in anadromous salmonids. Fish and Fisheries, 17(2), 525-542.

  • Berdahl, A., Torney, C. J., Schertzer, E., & Levin, S. A. (2015). On the evolutionary interplay between dispersal and local adaptation in heterogeneous environments. Evolution, 69(6), 1390-1405.