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Department of Vertebrate Zoology

Division of Birds

Labrador Duck
Labrador Duck
Christina Gebhard © Smithsonian Institution
bar Caroline Judy, Pre-Doctoral fellow
    Caroline D. Judy
    Pre-Doctoral Fellow

  • Phone: (202) 633-0800
  • Fax: (202) 633-8084
  • E-mail: judyc[at]

  • Mailing Address:
    Smithsonian Institution
    Division of Birds
    PO Box 37012, MRC 116
    Washington, DC 20013-7012

  • Shipping Address:
    Smithsonian Institution
    Division of Birds
    1000 Constitution Ave, NW
    Washington, DC 20004

Related Links

Caroline’s webpage


PhD Candidate
Department of Biological Sciences and Museum of Natural Science
Louisiana State University (LSU)
August 2010 to present

M.Sc. University of Missouri – St. Louis (2007)

B.Sc. University of Georgia (2002)

Research Interests

I am interested in systematics and population genetics of birds. My dissertation focuses on Jamaican Streamertail hummingbirds (Trochilus polytmus and T. scitulus). These incipient species are known to hybridize, but the hybrid zone has stayed shockingly narrow through time. The origin and maintenance of such a narrow hybrid zone linking species with high dispersal capabilities on a small oceanic island defies traditional explanations. The standard toolbox of techniques and genetic markers used to study hybrid zones has failed to reveal fixed differences that are generally needed to reconstruct speciation scenarios. To tackle this problem, I am using an extensive specimen series and a next-generation sequencing program to target genes and gene regions that encode the observed morphological differences among populations.

Selected Publications

Carstens B, Brennan R, Chua V, Duffie C, Harvey M, Koch R, McMahan C, Nelson B, Newman C, Satler J, Seeholzer G; Probsic K, Tank D, Sullivan J. DOI: 10.1111/mec.12347 Model selection as a tool for phylogenographic inference: an example from the willow Salix melanopsis.

Duffie CV, Glen TC, Vargas FH, Parker PG (2009) Genetic Structure within and between island populations of the flightless cormorant (Phalacrocorax harrisi). Molecular Ecology, 18, 2103-2111

Duffie CV, Glenn T, Hagen C, Parker P (2007) Microsatellite markers isolated from the flightless cormorant (Phalacrocrax harrisi). Molecular Ecology Resources, 8, 625-627

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