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Dr. Thomas Hahn

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Position Title
Vice Chair of Academic Affairs

  • NPB
102 Animal Communication Lab

Profile Introduction

Environmental regulation of avian annual cycles of behavior, physiology and morphology; behavioral and physiological responses of birds to unpredictable environmental events.


1993    PhD    (Zoology)    University of Washington
1985    MS    (Biological Sciences)    Stanford University
1984    BS    (Biological Sciences)    Stanford University

Research Interests


Interfaces of behavior, endocrine and neuroendocrine physiology, ecology, and evolution. Specifically environmental regulation of avian annual schedules of reproduction, plumage molt and migration; scheduling tradeoffs between current reproduction and survival (future reproduction); evolution of mechanisms of responses to environmental cues such as day length, food, social factors; effects of unpredictable environmental events on behavior and physiology of free-living birds.


Avian communication, especially use of heterospecific mimicry in song, and learned non-song vocalizations.

Department and Center Affiliations

Department of Neurobiology, Physiology and Behavior


Society for Integrative and Comparative Biology

Society for Behavioral Neuroendocrinology

CBS Grad Group Affiliations

Animal Behavior (Chair)

Specialties / Focus

Animal Behavior

  • Behavior Ecology and Sociobiology
  • Physiology and Behavior
  • Communication
  • Behavior and Conservation

Graduate Groups not Housed in CBS

Avian Sciences

Ecology Graduate Group


Hahn Lab, Animal Communication Lab

  • Current students and postdocs: Aaron Haiman, (PhD student, Animal Behavior); Beth Schultz (PhD student, Animal Behavior); Helen Chmura (PhD student, Animal Behavior); Brandi Gartland (PhD student, Animal Behavior); William Rockey (PhD student, Ecology); Rachael Smith (Masters student, Avian Sciences); Naomi Ondrasek (postdoc). Former students and postdocs: Kati Brazeal (PhD 2014, Animal Behavior, currently postdoc, University of Nebraska); Maxine Zylberberg (PhD 2011, Animal Behavior, currently postdoc, UCSF); Danielle Brown (PhD 2011, Animal Behavior, currently lecturer, Middle Tennessee State University); Heather Watts (former postdoc, currently Assistant Professor, Loyola Marymount University); Jamie Cornelius (PhD 2009, Animal Behavior, currently Assistant Professor, Eastern Michigan University); Rodd Kelsey (PhD 2009, Animal Behavior, currently Biologist, Nature Conservancy); Shelley Parker (masters 2009, Avian Sciences); Kendra Sewall (PhD 2008, Animal Behavior, currently Assistant Professor, Virginia Tech);Kirsten Sanford (PhD 2006, MCIP, currently free-lance science educator, Bay Area);Marcel Losekoot (MS 2006, Avian Sciences, currently technician, Bodega Marine Lab);Elizabeth MacDougall-Shackleton (PhD 2000, Princeton University, currently associate professor, University of Western Ontario); Scott MacDougall-Shackleton (postdoc, Princeton University, currently associate professor, University of Western Ontario);Maria Pereyra (postdoc, UCD, currently assistant professor, University of Tulsa).

Field Sites

Numerous, in Wyoming, Washington, Oregon and California.

Teaching Interests

Animal Behavior, Hormones and Behavior, Comparative Vertebrate Reproduction, Comparative Endocrinology, Ornithology


NPB 117 Avian Physiology (Usually spring)

ANB 201 Animal Behavior Methods and grant writing (Spring)

NPB 102 Animal Behavior (Winter)

NPB 152 Hormones and Behavior (Spring)

PSC 123 Hormones and Behavior (Spring)

Personal Interests

Music, fishing, hiking