Brent Sigafus


Brent Sigafus grew up in Tucson and has devot­ed his career to the study and conservation of wildlife in the Sonoran Desert and surrounding areas. He began working with the USGS as an undergraduate at the University of Arizona in 2000, creating a specimen inventory data­base in collaboration with the USGS and National Park Service for the National Park Service Inventory and Monitoring Program. After graduating with a B.S. in natural resources, he became a volunteer for the USGS, focusing on data collection for bullfrogs and other desert amphibians, as well as assisting with mapping bullfrog dispersal. He began working with the USGS full-time in 2001 as a University of Arizona, Research Specialist for herpe­tologist Cecil Schwalbe. In 2009 Brent switched from a University employee to a USGS employee as a Biologist allowing him to expand into other scientific and support roles.

These days, Brent wears many hats, working as a research biologist and in a support role for other USGS scientists. As a Biologist, he works on the Amphibian Research and Monitoring Initiative ( leading the field work for Arizona. His many responsibilities for the Southwest Biological Science Center include IT support, office management, supervision of staff members and volunteers, the representative for the Desert Southwest Cooperative Ecosystems Study Unit (, and is a member of the Safety Committee. On a Bureau level he is the Pacific Region Firearms Safety Manager where he instructs others on the safe handling of firearms for Defense Against Wild Animals and Specimen Collection.

Brent continues to focus his research on amphibians, with par­ticular emphasis on conservation of the Chiricahua leopard frog. In addition to presenting at scientific conferences and co-authoring articles on amphibians, Brent participates in outreach events introducing stu­dents to desert wildlife. He is also a volunteer with the Boy Scouts of America, the father of two children, has numerous critters roaming around the house, and the devoted husband of his high-school sweetheart. 






Jarchow, C. J., B. R. Hossack, B. H. Sigafus, C. R. Schwalbe, and E. L. Muths. 2015. In-press. Modeling habitat connectivity to inform reintroductions: a case study with the Chiricahua leopard frog. Journal of Herpetology. [Link]

Chandler, R. B., E. Muths, B. H. Sigafus, C. R. Schwalbe, C. Jarchow, and B. R. Hossack. 2015. Spatial occupancy models for predicting metapopulation dynamics and viability following reintroduction. Journal of Applied Ecology, 52(5):1325-1333. [Link]

Sigafus, B. H., C. R. Schwalbe, B. R. Hossack, and E. Muths. 2014. Prevalence of the amphibian chytrid fungus (Batrachochytrium dendrobatidis) at Buenos Aires National Wildlife Refuge, Arizona, USA. Herpetology Review, 45:41-42. [Link]