Owl monitoring Photo Collage

The Northern Spotted Owl (NSO) Monitoring Program conducts long-term monitoring of NSO populations and habitat to determine the effectiveness of federal forest management on maintaining and restoring habitat conditions necessary to support viable populations of NSO on federally-administered lands throughout its range. Main objectives are to:

  1. Track status and trends of NSO populations and demographic rates on federal lands within its geographic range in the United States
  2. Track status and trends in the amount and distribution of NSO forest cover types and habitat on federal lands.

Population monitoring documents territorial occupancy, survival, reproductive success, and annual rate of population change in northern spotted owl demographic study areas. Maps depicting various forest cover types used by owls and habitat suitability are produced using species distribution models applied to forest structure and species composition maps developed by the LSOG monitoring program.

Contact Information

  • Raymond Davis - Program Manager
  • Katie Dugger - Lead scientist for the HJ Andrews (OR) and Southern Cascades (OR) Demographic Study Areas
  • Alan Franklin – Lead Scientist for the Northwest California Demographic Study Area
  • Damon Lesmeister – Lead Scientist for the Olympic Peninsula (WA), Cle Elum (WA), Coast Range (OR), Tyee (OR), Klamath (OR) Demographic Study Areas

Reports

Time Five-Year Monitoring Reports
20-Year Population Dugger, K. et al. 2016. The effects of habitat, climate, and Barred Owls on long-term demography of Northern Spotted Owls. The Condor. 118:57-116.
20-Year Habitat Davis, Raymond J.; Hollen, Bruce; Hobson, Jeremy; Gower, Julia E.; Keenum, David. 2016. Northwest Forest Plan—the first 20 years (1994-2013): status and trends of northern spotted owl habitats. Gen. Tech. Rep. PNW-GTR-929. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 54 p.
15-Year Davis, Raymond J.; Dugger, Katie M.; Mohoric, Shawne; Evers, Louisa; Aney, William C. 2011. Northwest Forest Plan—the first 15 years (1994–2008): status and trends of northern spotted owl populations and habitats. Gen. Tech. Rep. PNW-GTR-850. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 147 p.
10-Year Lint, Joseph, tech. coord. 2005. Northwest Forest Plan—the first 10 years (1994–2003): status and trends of northern spotted owl populations and habitat. Gen. Tech. Rep. PNW-GTR-648. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 176 p.
Monitoring Plan Lint, Joseph; Noon, Barry; Anthony, Robert; Forsman, Eric; Raphael, Martin; Collopy, Michael; Starkey, Edward. 1999. Northern spotted owl effectiveness monitoring plan for the Northwest Forest Plan. Gen. Tech. Rep. PNW-GTR-440. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 43 p.

Other Reports

Report Details
D. Lesmeister et al. 2018. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2017. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 26 p.
D. Lesmeister et al. 2018. Demographic Characteristics of Spotted Owls in the Oregon Coast Range, 1990-2017. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 25 p.
D. Lesmeister et al. 2018. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1990-2017. Annual report. USDI Bureau of Land Management, Oregon State Office, Portland, OR. 21 p.
K. Dugger et al. 2016. Demographic characteristics and ecology of northern spotted owls (Strix occidentalis caurina) in the Southern Oregon Cascades. Annual research report. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR. 24 p.
D. Lesmeister et al. 2017. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2016. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 25 p.
D. Lesmeister et al. 2017. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2016. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 25 p.
K. Dugger et al. 2016. The demography of northern spotted owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Annual research report. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR. 52 p.
D. Lesmeister et al. 2016. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1990-2016. Annual report. USDI Bureau of Land Management, Oregon State Office, Portland, OR. 19 p.
A. Franklin et al. 2016. Monitoring the population ecology of spotted owls (Strix occidentalis caurina) in northwestern California: Annual results, 2016. Annual progress report for Region 5, USDA Forest Service. Colorado State University, Ft. Collins, CO. 32 p.
D. Lesmeister et al. 2017. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) in the Olympic National Forest, Washington, 1987-2016. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 13 p.
D. Lesmeister et al. 2017. Demographic characteristics of northern spotted owls (Strix occidentalis) on the Tyee Density Study Area, Roseburg, Oregon: 198512016. Annual research report. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 25 p.

For older reports see the document archive.


Data

Report Details
Glenn et al. (2017). Estimating density of a territorial species in a dynamic landscape. Landscape Ecol. 32:563-579.
20-Year Report
15-Year Report