Northern Rocky Mountain Science Center (NOROCK)


We hope you will enjoy learning about the variety of ecosystems and species we are studying throughout the United States. We are part of the Northwest Region of the USGS and our scientists work on diverse issues such as wildlife health, invasive species, climate, endangered species and much more. Click on Science to begin exploring the places we go and the species and landscapes we study.

New Map!

New Map!

Animated image showing grizzly bear range expansion in GYE: 1990-2016.

Where Bears Roam

NOROCK in the News

NOROCK in the News

Recent news and media featuring NOROCK Science. Click below for our most recent news feature.

How Species Deal


Ready to remove from the trap
August 16, 2017

As part of ongoing efforts required under the 2016 Yellowstone Grizzly Bear Conservation Strategy to monitor the population of grizzly bears in the Yellowstone Ecosystem, the Interagency Grizzly Bear Study Team (IGBST) traps and monitors grizzly bears for research and monitoring purposes. Here you will find trapping notifications for the 2017 field season.

An American pika collects grass and flowers to stockpile its winter food supplies.
July 12, 2017

A new study by the U.S. Geological Survey and its partners has identified situations and conditions where some animals display behavioral flexibility – the ability to rapidly change behavior in response to short – or long-term environmental changes such as climate variability. 

A mother grizzly bear and her cub in the Greater Yellowstone Ecosystem.
July 5, 2017

From the journals of Lewis & Clark, April 13, 1805 (in the vicinity of Pouch Point Recreation Area - 16 miles south of New Town, North Dakota):


Year Published: 2017

A global multiproxy database for temperature reconstructions of the Common Era

Reproducible climate reconstructions of the Common Era (1 CE to present) are key to placing industrial-era warming into the context of natural climatic variability. Here we present a community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative. The database gathers 692 records from 648 locations, including all...

Emile-Geay, Julian; McKay, Nicholas P.; Kaufman, Darrell S.; von Gunten, Lucien; Wang, Jianghao; Anchukaitis, Kevin J.; Abram, Nerilie J.; Addison, Jason A.; Curran, Mark A.J.; Evans, Michael N.; Henley, Benjamin J.; Hao, Zhixin; Martrat, Belen; McGregor, Helen V.; Neukom, Raphael; Pederson, Gregory T.; Stenni, Barbara; Thirumalai, Kaustubh; Werner, Johannes P.; Xu, Chenxi; Divine, Dmitry V.; Dixon, Bronwyn C.; Gergis, Joelle; Mundo, Ignacio A.; Nakatsuka, T.; Phipps, Steven J.; Routson, Cody C.; Steig, Eric J.; Tierney, Jessica E.; Tyler, Jonathan J.; Allen, Kathryn J.; Bertler, Nancy A. N.; Bjorklund, Jesper; Chase, Brian M.; Chen, Min-Te; Cook, Ed; de Jong, Rixt; DeLong, Kristine L.; Dixon, Daniel A.; Ekaykin, Alexey A.; Ersek, Vasile; Filipsson, Helena L.; Francus, Pierre; Freund, Mandy B.; Frezzotti, M.; Gaire, Narayan P.; Gajewski, Konrad; Ge, Quansheng; Goosse, Hugues; Gornostaeva, Anastasia; Grosjean, Martin; Horiuchi, Kazuho; Hormes, Anne; Husum, Katrine; Isaksson, Elisabeth; Kandasamy, Selvaraj; Kawamura, Kenji; Koc, Nalan; Leduc, Guillaume; Linderholm, Hans W.; Lorrey, Andrew M.; Mikhalenko, Vladimir; Mortyn, P. Graham; Motoyama, Hideaki; Moy, Andrew D.; Mulvaney, Robert; Munz, Philipp M.; Nash, David J.; Oerter, Hans; Opel, Thomas; Orsi, Anais J.; Ovchinnikov, Dmitriy V.; Porter, Trevor J.; Roop, Heidi; Saenger, Casey; Sano, Masaki; Sauchyn, David; Saunders, K.M.; Seidenkrantz, Marit-Solveig; Severi, Mirko; Shao, X.; Sicre, Marie-Alexandrine; Sigl, Michael; Sinclair, Kate; St. George, Scott; St. Jacques, Jeannine-Marie; Thamban, Meloth; Thapa, Udya Kuwar; Thomas, E.; Turney, Chris; Uemura, Ryu; Viau, A.E.; Vladimirova, Diana O.; Wahl, Eugene; White, James W. C.; Yu, Z.; Zinke, Jens
Emile-Geay J, Mckay NP, Kaufman DS, Gunten Von L, Wang J, Anchukaitis KJ, Abram NJ, Addison JA, Curran MAJ, Evans MN, Henley BJ, Hao Z, Martrat B, McGregor HV, Neukom R, Pederson GT, Stenni B, Thirumalai K, Werner JP, Xu C, Divine DV, Dixon BC, Gergis J, Mundo IA, Nakatsuka T, Phipps SJ, Routson CC, Steig EJ, Tierney JE, Tyler JJ, Allen KJ, Bertler NAN, Björklund J, Chase BM, Chen M-T, Cook E, de Jong R, Delong KL, Dixon DA, Ekaykin AA, Ersek V, Filipsson HL, Francus P, Freund MB, Frezzotti M, Gaire NP, Gajewski K, Ge Q, Goosse H, Gornostaeva A, Grosjean M, Horiuchi K, Hormes A, Husum K, Isaksson E, Kandasamy S, Kawamura K, Kilbourne KH, Koç N, Leduc G, Linderholm HW, Lorrey AM, Mikhalenko V, Mortyn PG, Motoyama H, Moy AD, Mulvaney R, Munz PM, Nash DJ, Oerter H, Opel T, Orsi AJ, Ovchinnikov DV, Porter TJ, Roop HA, Saenger C, Sano M, Sauchyn D, Saunders KM, Seidenkrantz M-S, Severi M, Shao X, Sicre M-A, Sigl M, Sinclair K, St George S, St-Jacques J-M, Thamban M, Kuwar Thapa U, Thomas ER, Turney C, Uemura R, Viau AE, Vladimirova DO, Wahl ER, White JWC, Yu Z, Zinke J. 2017. A global multiproxy database for temperature reconstructions of the Common Era. Scientific Data. The Author(s) SN - 4: 170088. DOI: 10.1038/sdata.2017.88.

Year Published: 2017

Behavioral flexibility as a mechanism for coping with climate change

Of the primary responses to contemporary climate change – “move, adapt, acclimate, or die” – that are available to organisms, “acclimate” may be effectively achieved through behavioral modification. Behavioral flexibility allows animals to rapidly cope with changing environmental conditions, and behavior represents an important component of a...

Beever, Erik; Hall, L. Embere; Varner, Johanna; Loosen, Anne E.; Dunham, Jason; Gahl, Megan K.; Smith, Felisa A.; Lawler, Joshua J.

Year Published: 2017

Yellowstone grizzly bears: Ecology and conservation of an icon of wildness

No abstract available.

White, P.J.; Gunther, Kerry A.; van Manen, Frank T.
Yellowstone grizzly bears : ecology and conservation of an icon of wildness / editors, P.J. White, Kerry A. Gunther, and Frank T. van Manen ; contributing authors, Daniel D. Bjornlie [and thirteen others] ; managing editor, Jennifer A. Jerrett. Yellowstone National Park, [Wyoming] : National Park Service, Yellowstone National Park ; [Bozeman, Montana] : U.S. Geological Survey, Northern Rocky Mountain Science Center, 2017.