Beginning Jan. 18, 2022, the Zoo is open Thursdays, Fridays, Saturdays and Sundays from 8 a.m. to 3 p.m. 

Entry passes are required for all guests, including infants. All visitors ages 2 and older are required to wear a mask in all indoor spaces at the Zoo, regardless of their vaccination status. Fully vaccinated visitors do not need to wear a mask in outdoor areas. Select animal buildings remain closed.

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Pete Marra, Ph.D.

Senior Scientist Emeritus
B.S., Southern Connecticut State University; M.S., Louisiana State University; Ph.D., Dartmouth College

Pete Marra is a senior scientist emeritus and the former director of the Smithsonian Migratory Bird Center. His research in avian conservation science has three broad themes, including the ecology of migratory birds, urban ecosystem ecology and disease ecology.

Marra's primary interests lie in understanding the factors that control population persistence and dynamics, so his research examines the roles of climate, habitat, food and pathogens, as well as other anthropogenic sources of mortality on the individual condition of both migratory and resident birds.

Marra's research emphasizes incorporating events throughout the annual cycle to understand how more complex interactions across seasons drive the ecology and evolution of species, and he uses this information to find conservation solutions. To do this, he has developed and incorporated multiple novel and emerging tracking techniques into his research.

Marra has founded several large research and communication initiatives, including Neighborhood Nestwatch, The Migratory Connectivity Project and the Animal Mortality and Monitoring Program. Communicating his science and his excitement for the conservation of wildlife to as wide an audience as possible, including the general public, is a high priority of his overall program.

Marra and his students, post docs and colleagues have published more than 170 papers in journals such as Science, Nature, Proceedings of the National Academy of Sciences, Proceedings of the Royal Society and Frontiers in Ecology and the Environment. In 2016, Marra also published a book, "Cat Wars: The Devastating Consequences of a Cuddly Killer."
Marra earned a B.S. from Southern Connecticut State University, a master's from Louisiana State University and a Ph.D from Dartmouth College.
He is co-founder of Tree House Concerts, an avid fly fisherman, passionate cook and father of two.
Recent Publications: 
Bennett, Kevin F. P.,Evans, Brian S.,Clark, J. Alan,Marra, Peter P. 2021. Domestic Cat Abundance and Activity Across a Residential Land Use Gradient. Frontiers in Ecology and Evolution, . 10.3389/fevo.2021.643845
Bennett, Ruth E.,Sillett, T. Scott,Rice, Robert A.,Marra, Peter P. 2021. Impact of cocoa agricultural intensification on bird diversity and community composition. Conservation Biology, . 10.1111/cobi.13779
Brunner, Alicia R.,Cooper, Nathan W.,Marra, Peter P. 2021. First known record of Kirtland's Warbler (Setophaga kirtlandii) observed and captured in Jamaica. The Wilson Journal of Ornithology, 746–749. 10.1676/19-137