Tracy Zarrillo

Department of Entomology

The Connecticut Agricultural Experiment Station
123 Huntington Street
New Haven, CT 06511
Voice: (203) 974-8473 Fax: (203) 974-8502


Tracy has expertise in native bee taxonomy, native bee monitoring and survey techniques, and pollinator conservation.  She can do species-level identifications for the apoid fauna in the northeastern U.S., specializing in the genera Bombus, Andrena, Ceratina, and Lasioglossum.



B.S., Biology, Southern Connecticut State University, 1992

M.S., Biology, Southern Connecticut State University, 2016


Training Received in Wild Bee Identification and Pollinator Conservation:

  • Native Bee Identification, Ecology, Research and Monitoring Course: July 5-10, 2010, FWS National Conservation Training Center, West Virginia.
  • Pollinator Conservation Planning Short Course: July 6, 2011, University Of Rhode Island, Kingston, Xerces Society.
  • Dialictus Identification Course: March 23-25, 2012, University of Massachusetts, Amherst.
Teaching Workshops:
  • Pollinator Conservation Planning Short Course, Xerces Society:  April 12, 2012, Tolland County Agricultural Center, Vernon, Connecticut.
  • Northeastern Bee Identification Workshop, March 22-24, 2013, University of Massachusetts, Amherst, Massachusetts.
  • Bumble Bee Identification Workshop, March 21, 2014, The Connecticut Entomological Society, University of Connecticut, Connecticut.

Station Career:

Agricultural Research Assistant II, 1992-1994

Agricultural Research Assistant III, 1994-1998

Agricultural Research Technician I, 1998-2014

Agricultural Research Technician II, 2014-2022

Assistant Agricultural Scientist I, 2022-present


Responsibilities and Past Research:

Ms. Zarrillo has provided assistance in the field and laboratory for research projects dealing with bee pollination, pesticides, floral preference trials, and wild bee diversity in Connecticut. She initiated and coordinates the Wild Bee Monitoring Program in Connecticut, which includes cooperators at the White Memorial Conservation Center in Litchfield, the Stewart B. McKinney National Wildlife Refuge in Westbrook, and CAES campuses around the state. She has examined wild bee communities living in Connecticut's maritime habitats and has identified potential threats due to climate change and non-native plant species. In addition to her bee work, she has also assisted in natural history surveys of longhorn beetles, exotic insect surveys, and surveys of bio-control agents for emerald ash borer throughout Connecticut.


Focus of Current Research:

Ms. Zarrillo is currently writing a checklist of the wild bees of Connecticut. She is also collaborating with the Connecticut Department of Energy and Environmental Protection on a meadow restoration project and will be monitoring the response of wild bees and monarchs to the improved habitat over time. She conducts surveys for rare and/or threatened wild bee species in Connecticut and is interested in the biology of bees that specialize on specific types of pollen.