SNAPSHOT USA 2020: A second coordinated national camera trap survey of the United States during the COVID-19 pandemic

Roland Kays, Michael V. Cove, Jose Diaz, Kimberly Todd, Claire Bresnan, Matt Snider, Thomas E. Lee, Jonathan G. Jasper, Brianna Douglas, Anthony P. Crupi, Katherine C.B. Weiss, Helen Rowe, Tiffany Sprague, Jan Schipper, Christopher A. Lepczyk, Jean E. Fantle-Lepczyk, Jon Davenport, Marketa Zimova, Zach Farris, Jacque WilliamsonM. Caitlin Fisher-Reid, Drew Rezendes, Sean M. King, Petros Chrysafis, Alex J. Jensen, David S. Jachowski, Katherine C. King, Daniel J. Herrera, Sophie Moore, Marius van der Merwe, Jason V. Lombardi, Maksim Sergeyev, Michael E. Tewes, Robert V. Horan, Michael S. Rentz, Ace Driver, La Roy S.E. Brandt, Christopher Nagy, Peter Alexander, Sean P. Maher, Andrea K. Darracq, Evan G. Barr, George Hess, Stephen L. Webb, Mike D. Proctor, John P. Vanek, Diana J.R. Lafferty, Tru Hubbard, Jaime E. Jiménez, Craig McCain, Jorie Favreau, Jack Fogarty, Jacob Hill, Steven Hammerich, Morgan Gray, Christine C. Rega-Brodsky, Caleb Durbin, Elizabeth A. Flaherty, Jarred Brooke, Stephanie S. Coster, Richard G. Lathrop, Katarina Russell, Daniel A. Bogan, Hila Shamon, Brigit Rooney, Aimee Rockhill, Robert C. Lonsinger, M. Teague O'Mara, Justin A. Compton, Erika L. Barthelmess, Katherine E. Andy, Jerrold L. Belant, Tyler Petroelje, Nathaniel H. Wehr, Dean E. Beyer, Daniel G. Scognamillo, Chris Schalk, Kara Day, Caroline N. Ellison, Chip Ruthven, Blaine Nunley, Sarah Fritts, Christopher A. Whittier, Sean A. Neiswenter, Robert Pelletier, Brett A. DeGregorio, Erin K. Kuprewicz, Miranda L. Davis, Carolina Baruzzi, Marcus A. Lashley, Brandon McDonald, David Mason, Derek R. Risch, Maximilian L. Allen, Laura S. Whipple, Jinelle H. Sperry, Emmarie Alexander, Patrick J. Wolff, Robert H. Hagen, Alessio Mortelliti, Amay Bolinjcar, Andrew M. Wilson, Scott Van Norman, Cailey Powell, Henry Coletto, Martha Schauss, Helen Bontrager, James Beasley, Susan N. Ellis-Felege, Samuel R. Wehr, Sean T. Giery, Charles E. Pekins, Summer H. LaRose, Ronald S. Revord, Christopher P. Hansen, Lonnie Hansen, Joshua J. Millspaugh, Adam Zorn, Brian D. Gerber, Kylie Rezendes, Jessie Adley, Jennifer Sevin, Austin M. Green, Çağan H. Şekercioğlu, Mary E. Pendergast, Kayleigh Mullen, Tori Bird, Andrew J. Edelman, Andrea Romero, Brian J. O'Neill, Noel Schmitz, Rebecca A. Vandermus, Jesse M. Alston, Kellie M. Kuhn, Steven C. Hasstedt, Damon B. Lesmeister, Cara L. Appel, Christopher Rota, Jennifer L. Stenglein, Christine Anhalt-Depies, Carrie L. Nelson, Robert A. Long, Kathryn R. Remine, Mark J. Jordan, L. Mark Elbroch, Dylan Bergman, Sara Cendejas-Zarelli, Kim Sager-Fradkin, Mike Conner, Gail Morris, Elizabeth Parsons, Haydée Hernández-Yáñez, William J. McShea

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Managing wildlife populations in the face of global change requires regular data on the abundance and distribution of wild animals, but acquiring these over appropriate spatial scales in a sustainable way has proven challenging. Here we present the data from Snapshot USA 2020, a second annual national mammal survey of the USA. This project involved 152 scientists setting camera traps in a standardized protocol at 1485 locations across 103 arrays in 43 states for a total of 52,710 trap-nights of survey effort. Most (58) of these arrays were also sampled during the same months (September and October) in 2019, providing a direct comparison of animal populations in 2 years that includes data from both during and before the COVID-19 pandemic. All data were managed by the eMammal system, with all species identifications checked by at least two reviewers. In total, we recorded 117,415 detections of 78 species of wild mammals, 9236 detections of at least 43 species of birds, 15,851 detections of six domestic animals and 23,825 detections of humans or their vehicles. Spatial differences across arrays explained more variation in the relative abundance than temporal variation across years for all 38 species modeled, although there are examples of significant site-level differences among years for many species. Temporal results show how species allocate their time and can be used to study species interactions, including between humans and wildlife. These data provide a snapshot of the mammal community of the USA for 2020 and will be useful for exploring the drivers of spatial and temporal changes in relative abundance and distribution, and the impacts of species interactions on daily activity patterns. There are no copyright restrictions, and please cite this paper when using these data, or a subset of these data, for publication.

Original languageEnglish
Article numbere3775
Issue number10
StatePublished - Oct 2022


  • Carnivora
  • Cetartiodactyla
  • Didelphimorphia
  • Lagomorpha
  • biodiversity
  • biogeography
  • camera traps
  • mammals
  • occupancy modeling
  • species distribution modeling


Dive into the research topics of 'SNAPSHOT USA 2020: A second coordinated national camera trap survey of the United States during the COVID-19 pandemic'. Together they form a unique fingerprint.

Cite this