Northwest Forest Plan

Interagency Regional
Monitoring Program

Northern Spotted Owl Reports & Publications

Subject Report Title Format
NWFP 15-Year Report
15-yr Monitoring Report 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. PDF, 147 pages
NWFP 10-Year Report
10-Year Monitoring Report J. Lint. 2005. Northwest Forest Plan-the first 10 years (1994-2003):  Status and trends of northern spotted owl populations and habitat. PNW-GTR-648. PDF, 176 pages, Parts A-D
Monitoring Plan
Effectiveness Monitoring Plan, Northern Spotted Owl Monitoring J. Lint et al. 1999. Northern spotted owl effectiveness monitoring plan for the Northwest Forest Plan. PNW-GTR-440 PDF, 43 pages
Annual Reports for 2011
Demographic characteristics of northern spotted owls in the Southern Cascades of Oregon, 1992-2011. Dugger , K., S. Andrews, E. Fleigel, L. Friar, T. Phillips, and F. Wagner. 2012. Demographic characteristics and ecology of spotted owls (Strix occidentalis caurina) in the southern Oregon Cascades. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 27p. PDF, 27 pages, 1.3 MB
Demographic characteristics of northern spotted owls in the Eastern Cascades of Wasington, 1989-2011. Forsman, E., S. Sovern, M. Taylor, J. StHilaire, and D. Phipps. 2011. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2011. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 23p. PDF, 23 pages, 2.9 MB
Demographic characteristics of northern spotted owls in the Oregon Coast Range, 1990-2011. Forsman, E., C. McCafferty, E. Divine, R. Lee, L. Mundy, T. Plawman, R. Spaul, and J. Swingle. 2012. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2011. Annual research report for 2011.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 15p. PDF, 15 pages, 2.8 MB
Demographic characteristics of northern spotted owls in the central Oregon Western Cascades, 1987-2011. Dugger, K., S. Ackers, R. Claremont, E. Hurkes, R. Leach, K. Skybak, A. Smoluk, and J. Winiarski. 2011. The demography of northern spotted owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 53p. PDF, 53 pages, 839 KB
Demographic characteristics of northern spotted owls in the Klamath Mountain Province of Oregon, 1990-2011. Davis, R., R. Horn, P. Caldwell, R. Crutchley, K. Fukuda, T. Kaufmann, C. Larson, H. May, and H. Wise. 2012. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1990-2011. Annual research report for 2011.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 20p PDF, 20 pages, 2.8 MB
Demographic characteristics of northern spotted owls in Northwestern California, 1985-2011. Franklin, A.B., P.C. Carlson, J.T. Rockweit, W. Lanier, B.R. Barry, A. Rex, T. Zaffarano, J. Shrum, and K. Wilson. 2012. Monitoring the population ecology of spotted owls (Strix occidentalis caurina) in northwetern Califorina: Annual results, 2011. Annual progress report for Region 5, USDA Forest Service. Colorado State University, Ft. Collins, CO. 31p. PDF, 31 pages, 240 KB
Demographic characteristics of northern spotted owls in the Olympic Peninsula, Wasington, 1987-2011. Forsman, E., B.L. Biswell, D. Kelso, and K. Williamson. 2012. Demographic characteristics of spotted owls (Strix occidentalis) on the Olympic Peninsula Study Area, Washington, 1987-2011. Annual research report for 2011.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 17p. PDF, 17 pages, 670 KB
Demographic characteristics of northern spotted owls in the Olympic National Park, Wasington, 1992-2011. S. Gremel. 2011. Spotted owl monitoring in Olympic National Park, 2011 annual report. USDI National Park Service, Olympia, WA. 16p. PDF, 16 pages, 763 KB
Demographic characteristics of northern spotted owls in the southern Oregon Coast Range of Oregon, 1985-2011. Forsman, E., J.A. Reid, S.M. Flannagan, J.S. Mowdy, and A.L. Price. 2012. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) on the Tyee density study area, Roseburg, Oregon: 1985-2011. Annual research report for 2011. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 18p. PDF, 18 pages, 983 KB
Old Report Archive
Demographic characteristics of northern spotted owls in the Southern Cascades of Oregon, 1992-2010. Dugger , K., S. Andrews, E. Fleigel, L. Friar, D. Strejc and F. Wagner. 2011. Demographic Characteristics and Ecology of Spotted Owls (Strix occidentalis caurina) in the Southern Oregon Cascades. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 30p. PDF, 30 pages, 603 KB
Demographic characteristics of northern spotted owls in the Eastern Cascades of Wasington, 1989-2010. Forsman, E., S. Sovern, M. Taylor, J. StHilaire, and D. Phipps. 2010. Demography of Spotted Owls on the east slope of the Cascade Range, Washington, 1989-2010. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 21p. PDF, 23 pages, 1.8 MB
Demographic characteristics of northern spotted owls in the Oregon Coast Range, 1990-2010. Forsman, E., T.Snetsinger, J. Cederstrom, R. Lee, I. Matthews, T. Plawman, N. Stephens, and J. Swingle. 2011. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2010. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 16p. PDF, 16 pages, 1.0 MB
Demographic characteristics of northern spotted owls in the central Oregon Western Cascades, 1987-2010. Dugger, K., S. Ackers, R. Claremont, R. Leach, B. Meiering, D. Sedgwick,K. Skybak, and A. Smoluk. 2011. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 51p. PDF, 51 pages, 771 KB
Demographic characteristics of northern spotted owls in the Klamath Mountain Province of Oregon, 1985-2010. R. Horn, P. Caldwell, S. Cross, R. Crutchley , K. Fukuda, C. Larson, and H. Wise. 2011. Demographic Characteristics of Northern Spotted Owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1985-2010. Annual research report for 2010.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 19p PDF, 19 pages, 1.9 MB
Demographic characteristics of northern spotted owls in Northwestern California, 1985-2010. Franklin, A.B., P.C. Carlson, J.T. Rockweit, K. Lewicki, M. Immel, H. Hareza, H., J. Smith, W. Lanier, B.R. Barry, and K. Wilson. 2011. Monitoring the population of spotted owls (Strix occidentalis caurina) in northwetern Califorina: Annual results, 2010. Annual progress report for Region 5, USDA Forest Service. Colorado State University, Ft. Collins, CO. 22p. PDF, 22 pages, 172 KB
Demographic characteristics of northern spotted owls in the Olympic Peninsula, Wasington, 1987-2010. Forsman, E., B.L. Biswell, D. Kelso, and C. McCafferty. 2011. Demographic characteristics of spotted owls (Strix occidentalis) on the Olympic Peninsula Study Area, Washington, 1987-2010. Annual research report for 2010.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 17p. PDF, 17 pages, 296 KB
Demographic characteristics of northern spotted owls in the Olympic National Park, Wasington, 1992-2010. S. Gremel. 2010. Spotted Owl Monitoring in Olympic National Park, 2010 Annual Report. USDI National Park Service, Olympia, WA. 17p. PDF, 17 pages, 795 KB
Demographic characteristics of northern spotted owls in the southern Oregon Coast Range of Oregon, 1985-2010. Forsman, E., J.A. Reid, J.D. Baldwin, J.S. Mowdy, and A.L. Price. 2011. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) on the Tyee Density Study Area, Roseburg, Oregon: 1985-2010. Annual research report for 2010. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 19p. PDF, 19 pages, 1.4 MB
Demographic characteristics of northern spotted owls in the central Oregon Western Cascades, 1987-2009. Anthony , R. S. Ackers, R. Claremont, N. Crull, C. McCafferty, M. Schwartz, A. Smoluk, and S. Wilson. 2010. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 28p. PDF, 28 pages, 218 KB
Demographic characteristics of northern spotted owls in the southern Oregon Coast Range of Oregon, 1985-2009. Forsman, E., J.A. Reid, J.D. Baldwin, J.S. Mowdy, and A.L. Price. 2010. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) on the Tyee Density Study Area, Roseburg, Oregon: 1985-2008. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 20p. PDF, 20 pages, 1.1 MB
Demographic characteristics of northern spotted owls in the Olympic Peninsula, Wasington, 1987-2009. Forsman, E., B.L. Biswell, D. Kelso, K. Laubenheimer, and E. Graham. 2010. Demographic characteristics of spotted owls (Strix occidentalis) on the Olympic Peninsula Study Area, Washington, 1987-2009. Annual research report for 2009.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 18p. PDF, 19 pages, 314 KB
Demographic characteristics of northern spotted owls in the Southern Cascades of Oregonn, 1992-2009. Anthony, R., S. Andrews, E. Fleigel, L. Friar, D. Strejc and F. Wagner. 2010. Demographic Characteristics and Ecology of Spotted Owls (Strix occidentalis caurina) in the Southern Oregon Cascades. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 28p. PDF, 28 pages, 1.9 MB
Demographic characteristics of northern spotted owls in the Oregon Coast Range, 1990-2009. Forsman, E., T.Snetsinger, J. Cederstrom, R. Lee, I. Matthews, N. Stephens, and J. Swingle. 2010. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2009. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 14p. PDF, 14 pages, 2.4 MB
Demographic characteristics of northern spotted owls in the Eastern Cascades of Wasington, 1989-2009. Forsman, E., S. Sovern, M. Taylor, J. StHilaire, and D. Phipps. 2010. Demography of Spotted Owls on the east slope of the Cascade Range, Washington, 1989-2009. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 21p. PDF, 21 pages, 605 KB
Demographic characteristics of northern spotted owls in the Klamath Mountain Province of Oregon, 1985-2009. R. Horn, P. Caldwell, S. Cross, R. Crutchley , K. Fukuda, C. Larson, J. Lowden, M. O'Hara, J. Stegmeier, and H. Wise. 2010. Demographic Characteristics of Northern Spotted Owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1985-2009. Annual research report for 2009.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 17p PDF, 17 pages, 2 MB
Demographic characteristics of northern spotted owls in the Olympic National Park, Wasington, 1992-2009. S. Gremel. 2010. Spotted Owl Monitoring in Olympic National Park, 2009 Annual Report. USDI National Park Service, Olympia, WA. 17p. PDF, 17 pages, 415 KB
Demographic characteristics of northern spotted owls in Northwestern California, 1985-2009. Franklin, A.B., P.C. Carlson, J.T. Rockweit, K. Lewicki, M. Immel, A. Van Lanen, H. Hareza, R. Wise, V. Schipani, and K. Wilson. 2010. Monitoring the population of spotted owls (Strix occidentalis caurina) in northwetern Califorina: Annual results, 2009. Annual progress report for Region 5, USDA Forest Service. Colorado State University, Ft. Collins, CO. 22p. PDF, 22 pages, 157 KB
Demographic characteristics of northern spotted owls in the central Oregon Coast Range of Oregon, 1990–2008. Forsman, E., T.Snetsinger, C. McCafferty, J. Swingle, S. Hamilton, T. Plawman, J. Cederstrom and I. Koski. 2009. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2008. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 14p. PDF, 14 pages, 287 KB
Demographic characteristics of northern spotted owls in the central Oregon Western Cascades, 1987–2008. Anthony , R. S. Ackers, R. Claremont, C. Domschke, M. Schwartz, A. Smoluk, and L. Wyss. 2009. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 38p. PDF, 38 pages, 189 KB
Demographic characteristics of northern spotted owls in the Klamath Mountain Province of Oregon, 1985–2008. Lint, J., R. Horn, S. Cross, R. Crutchley , K. Fukuda, C. Larson, J. Lowden, J. Rosier, J. Stegmeier, and H. Wise. 2009. Demographic Characteristics of Northern Spotted Owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon, 1985-2008. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 14p PDF, 14 pages, 240 KB
Demographic characteristics of northern spotted owls in the southern Oregon Coast Range of Oregon, 1985–2008. Forsman, E., J.A. Reid, J.S. Mowdy, M.E. Oleri, and A.L. Price. 2009. Demographic characteristics of northern spotted owls (Strix occidentalis caurina) on the Tyee Density Study Area, Roseburg, Oregon: 1985-2008. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 18p. PDF, 18 pages, 1.3 MB
Demographic characteristics of northern spotted owls in the Olympic National Park, Wasington, 1992–2008. S. Gremel. 2009. Spotted Owl Monitoring in Olympic National Park, 2008 Annual Report. USDI National Park Service, Olympia, WA. 19p. PDF, 19 pages, 514 KB
Demographic characteristics of northern spotted owls in the Olympic Peninsula, Wasington, 1987–2008. Forsman, E., B.L. Biswell, D. Kelso and M. Koranda. 2009. Demographic characteristics of spotted owls (Strix occidentalis) on the Olympic Peninsula Study Area, Washington, 1987-2008. Annual research report for 2008.USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 18p. PDF, 18 pages, 935 KB
Demographic characteristics of northern spotted owls in the Eastern Cascades of Wasington, 1989–2008. Forsman, E., S. Sovern, M. Taylor, J. StHilaire, and D. Phipps. 2009. Demography of Spotted Owls on the east slope of the Cascade Range, Washington, 1989-2008. USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR and Dept. of Fish and Wildlife, Oregon State Univ., Corvallis, OR. 19p. PDF, 19 pages, 605 KB
Demographic characteristics of northern spotted owls in the Southern Cascades of Oregonn, 1992–2008. Anthony , R., S. Andrews, L. Friar, T. Phillips, D. Strejc and F. Wagner. 2009. Demographic Characteristics and Ecology of Spotted Owls (Strix occidentalis caurina) in the Southern Oregon Cascades. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. 27p. PDF, 27 pages, 1.8 MB
Status and trends in demography of northern spotted owls, 1985-2003 R. Anthony et al. 2004.  Status and trends in demography of northern spotted owls, 1985-2003. Final Report. PDF, 180 pages, 694 KB
2002 Annual Summary Report, Northern Spotted Owl Monitoring J. Lint et al. 2003. Northern Spotted Owl Effectiveness Monitoring. Northwest Forest Plan. 2002 Annual Summary Report. PDF, 17 pages, 601 KB
Demographic characteristics of northern spotted owls on the Olympic Peninsula Study Area, 1987-2002 E. Forsman et al. 2003. Demographic characteristics of northern spotted owls (Strix occidentalis) on the Olympic Peninsula Study Area, Washington, 1987-2002. Annual research report for 2002. PDF, 13 pages, 209 KB
Demography of spotted owls on the east slope of the Cascade Range, 1989-2002 E. Forsman et al. 2002. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2002. Annual research report for 2002. PDF, 25 pages, 433 KB
Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2002 E. Forsman et al. 2003. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2002. Annual research report for 2002. PDF, 15 pages, 200 KB
The ecology of northern spotted owls on the Willamette National Forest, Oregon R. Anthony et al. 2002. The ecology of northern spotted owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon: Habitat use and demography. Annual research report for FY 2002. PDF, 27 pages, 165 KB
Demographic characteristics of spotted owls in the southern Oregon Cascades R. Anthony et al. 2002. Demographic characteristics of spotted owls in the southern Oregon Cascades. Annual research report for FY 2002. PDF, 23 pages, 267 KB
Demographic characteristics of northern spotted owls in the Klamath Province, 1983-2002 J. Lint et al. 2003. Demographic characteristics of northern spotted owls in the Klamath Province of Oregon, 1983-2002. Annual research report for FY 2002. PDF, 11 pages, 145 KB
Population ecology of the northern spotted owl in northwestern California: Annual Results, 2002 A. Franklin et al. 2003. Population ecology of the northern spotted owl in northwestern California: Annual Results, 2002. Annual Progress Report (Contract FS/53-91S8-00-EC14) to Region 5, USDA Forest Service. PDF, 21 pages, 124 KB
Demographic characteristics of northern spotted owls on the Tyee study area, Roseburg, Oregon, 1985-2002 E. Forsman et al. 2002. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2002. Annual research report for 2002. PDF, 12 pages, 409 KB
Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2001 E. Forsman et al. 2002. Demographic characteristics of spotted owls in the Oregon Coast Ranges, 1990-2001. Annual research report for FY2001. PDF, 14 pages, 40 KB
Population Ecology of the Northern Spotted Owl in Northwestern California: Annual Results, 2001 A. Franklin et al. 2002. Population ecology of the northern spotted owl (Strix occidentalis caurina) in northwestern California: Annual Results, 2002. Annual Progress Report (Contract FS/53-91S8-00-EC14) to Region 5, USDA Forest Service. PDF, 21 pages, 438 KB
2001 Annual Summary Report, Northern Spotted Owl Monitoring J. Lint et al. 2002. Northern Spotted Owl Effectiveness Monitoring. Northwest Forest Plan. Annual Summary Report 2001. PDF, 12 pages, 421 KB
2000 Annual Summary Report, Northern Spotted Owl Monitoring J. Lint et al. 2001. Northern Spotted Owl effectiveness monitoring under the Northwest Forest Plan. Annual Summary Report 2000. PDF, 11 pages, 234 KB
2001 Annual Report, Spotted Owl Monitoring in Olympic National Park, 2001 S. Gremel. 2001. Spotted Owl Monitoring in Olympic National Park, 2001. 2001 Annual Report. PDF, 17 pages, 266 KB
Demographic Characteristics of Spotted Owls in the Southern Oregon Cascades, 2001 R. Anthony et al. 2001. Demographic Characteristics of Spotted Owls in the Southern Oregon Cascades, December 2001. Annual research report for FY 2001. PDF, 27 pages, 79 KB
Demographic characteristics of northern spotted owls on the Tyee Study Area, Roseburg, Oregon: 1985-2001. E. Forsman et al. 2002. Demographic characteristics of northern spotted owls (Strix occidentalis) on the Tyee Study Area, Roseburg, Oregon: 1985-2001. Annual research report for 20012. PDF, 11 pages, 88 KB
Demographic Characteristics of Northern Spotted Owls in the Klamath Mountain Province of Oregon J. Lint et al. 2002. Demographic Characteristics of Northern Spotted Owls (Strix occidentalis caurina) in the Klamath Mountain Province of Oregon. Annual research report for FY 2001. PDF, 10 pages, 32 KB
The Ecology of Northern Spotted Owls on the Willamette National Forest R. Anthony et al. 2001. The ecology of northern spotted owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon: Habitat use and demography. Annual research report for FY 2001. PDF, 25 pages, 61 KB
Demography of Spotted Owls on the east slope of the Cascade Range, 1989-2001 E. Forsman et al. 2001. Demography of spotted owls on the east slope of the Cascade Range, Washington, 1989-2001. Annual research report for 2002. PDF, 3 pages, 34 KB
Range-wide status and trends in northern spotted owl populations A. Franklin et al. 1999. Range-wide status and trends in northern spotted owl populations PDF, 72 pages, 90 KB
Demography of the northern spotted owl Forsman, Eric D. et al. 1993. Workshop Proceedings. Fort Collins, CO. Studies in Avian Biology No. 17. Cooper Ornithological Society. 122p.  
Climate, habitat quality and fitness in northern spotted owl populations in northwestern California. Franklin, Alan, B. et al. 2000. Ecological Monographs 70(4):539-590. Ecological Society of America