Peer-reviewed Publications
Kim, H., R.B. Siegel, J.L. Stephens, J.C. Hagar, B.J. Furnas, M.-S. Jeong, B.C. McComb, and M.G. Betts. 2024. Annual migratory movement, apparent molt-migration, migration schedule, and diffuse migratory connectivity of Hermit Warblers. Avian Conservation and Ecology 19:6. PDF
Ray, C., R.M. Rochefort, J.I. Ransom, J.C.B. Nesmith, S.A. Haultain, T.D. Schaming, J.R. Boetsch, M.L. Holmgren, R.L. Wilkerson, and R.B. Siegel. 2020. Assessing trends and vulnerabilities in the mutualism between whitebark pine (Pinus albicaulis) and Clark’s nutcracker (Nucifraga columbiana) in national parks of the Sierra-Cascade region. PlosONE 2020:1-25. PDF
Ray, C., M.L. Holmgren, R.L. Wilkerson, R.B. Siegel, and J.R. Boetsch, K.J. Jenkins, and J.I. Ransom. 2019. Trends in landbird density at two national parks in fragmented, mixed-use landscapes of the Pacific Northwest. The Northwestern Naturalist 100:1-25. PDF
Ray, C., J.F. Saracco, M.L. Holmgren, R.L. Wilkerson, R.B. Siegel, K.J. Jenkins, J.I. Ransom, P.J. Happe, J.R. Boetsch, and M.H. Huff. 2018. Landbird population trends in mountain and historical parks of the North Coast and Cascades Network: 2005–2016 synthesis. Natural Resource Report NPS/NCCN/NRR 2018/1673. National Park Service, Fort Collins, CO. PDF
Ray, C., J. Saracco, K. Jenkins, M. Huff, P. Happe, and J. Ransom. 2017. Development of a robust analytical framework for assessing landbird population trends, dynamics and relationships with environmental covariates in the North Coast and Cascades Network. National Park Service Natural Resource Report NPS/NCCN/NRR 2017/1483. National Park Service, Fort Collins, CO. PDF
Ray, C., J.F. Saracco, M.L. Holmgren, R.L. Wilkerson, R.B. Siegel, K.J. Jenkins, J.I. Ransom, P.J. Happe, J.R. Boetsch, and M.H. Huff. 2017. Recent stability of resident and migratory landbird populations in National Parks of the Pacific Northwest. Ecosphere 8:e01902. PDF
Saracco, J.F., A.L. Holmgren, R.L. Wilkerson, R.B. Siegel, R.C. Kuntz II, K.J. Jenkins, P.J. Happe, J.R. Boetsch, and M.H. Huff. 2014. Landbird trends in National Parks of the North Coast and Cascades Network, 2005-2012. U.S. Geological Survey open-file report 2014–1202. PDF
Siegel, R.B., R.L. Wilkerson, R.C. Kuntz II, J.F. Saracco, and A.L. Holmgren. 2012. Elevation ranges of birds at Mount Rainier National Park, North Cascades National Park Service Complex, and Olympic National Park. The Northwestern Naturalist 93:23-39. PDF
Other Publications and Reports
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2022. North Coast and Cascades Network landbird monitoring: report for the 2021 field season. Natural Resource Data Series NPS/NCCN/NRDS 2022/1371. National Park Service, Fort Collins, Colorado.
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2021. North Coast and Cascades Network landbird monitoring: report for the 2020 field season. Natural Resource Data Series NPS/NCCN/NRDS 2021/1337. National Park Service, Fort Collins, Colorado. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2020. North Coast and Cascades Network landbird monitoring: report for the 2019 field season. Natural Resource Data Series NPS/NCCN/NRDS 2020/1284. National Park Service, Fort Collins, Colorado. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2019. North Coast and Cascades Network landbird monitoring: report for the 2018 field season. Natural Resource Data Series NPS/NCCN/NRDS 2019/1224. National Park Service, Fort Collins, Colorado. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2017. North Coast and Cascades Network landbird monitoring: report for the 2016 field season. Natural Resource Report NPS/NCCN/NRR 2017/1495. National Park Service, Fort Collins, CO. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and J.I. Ransom. 2016. North Coast and Cascades Network landbird monitoring report for the 2015 Field Season. Natural Resource Report NPS/NCCN/NRR2016/1241. The Institute for Bird Populations, Point Reyes Station, CA, and The National Park Service, North Cascades National Park Service Complex, Sedro-Woolley, WA. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and P.J. Happe. 2015. North Coast and Cascades Network landbird monitoring: report for the 2014 field season. Natural Resource Data Series NPS/NCCN/NRDS 2015/502. National Park Service, Fort Collins, CO. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and P.J. Happe. 2014. North Coast and Cascades Network landbird monitoring: report for the 2013 field season. Natural Resource Data Series NPS/NCCN/NRDS 2014/691. National Park Service, Fort Collins, CO. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and R.C. Kuntz II. 2013. North Coast Cascades Network landbird monitoring report for the 2012 field season. Natural Resource Data Series NPS/NCCN/NRDS 20113/523. National Park Service, Fort Collins, CO. PDF
Holmgren, A.L., R.L. Wilkerson, R.B. Siegel, and R.C. Kuntz II. 2012. North Coast Cascades Network landbird monitoring report for the 2011 field season. Natural Resource Report NPS/NCCN/NRTR. National Park Service, Fort Collins, CO. PDF
Holmgren, A., R.L. Wilkerson, R.B. Siegel, and R.C. Kuntz II. 2011. North Coast and Cascades Network Landbird Monitoring. Report for the 2010 Field Season. The Institute for Bird Populations, Point Reyes Station, CA.
Holmgren, M., R.L. Wilkerson, and R.B. Siegel. 2011. North Coast and Cascades Network landird monitoring: report for the 2010 field season. Natural Resources Technical Report NPG/NCCN/NRTR-2011/473. PDF
Holmgren, A., R.L. Wilkerson, R.B. Siegel, and R.C. Kuntz II. 2010. North Coast Cascades Landbird Monitoring; Report for the 2009 Field Season. The Institute for Bird Populations, Point Reyes Station, CA.
Siegel, R.B, R.C. Kuntz II, R.L. Wilkerson, and K.D. Kuhlman. 2010. Surveying for Spotted Owls in the northeastern portion of North Cascades National Park Service Complex, 2009-2010: report for the 2009 field season. Natural Resource Technical Report NPS/NCCN/NRTR/2010/334. National Park Service, Fort Collins, CO. PDF
Wilkerson, R.L., R.B. Siegel, and R.C. Kuntz II. 2010. North Coast Cascades Network landbird monitoring report for the 2009 field season. Natural Resource Report NPS/NCCN/NRTR—2010/392. PDF
Siegel, R.B., and R.C. Kuntz II. 2009. Designing a landbird monitoring program at North Cascades National Park Service Complex. Natural Resource Report NPS/NCCN/NRR—2009/075. PDF
Siegel, R.B., R.L. Wilkerson, and R.C. Kuntz II. 2009. Landbird inventory for Lewis and Clark National Historical Park (2006). Natural Resource Technical Report NPS/NCCN/NRTR 2009/166. National Park Service, Fort Collins, CO. PDF
Siegel, R.B., R.L. Wilkerson, and R.C. Kuntz. 2009. Landbird inventory for Lewis and Clark National Historical Park (2004). Natural Resource Technical Report NPS/NCCN/NRTR2009/165. National Park Service, Fort Collins, CO. PDF
Siegel, R.B., R.L. Wilkerson, and S. Hall. 2009. Landbird inventory for Olympic National Park (2002-2003). Natural Resource Technical Report NPS/NCCN/NRTR 2009/159. National Park Service, Fort Collins, CO.
Siegel, R.B., R.L. Wilkerson, H.K. Pedersen, and R.C. Kuntz II. 2009. Landbird inventory of San Juan Island National Historical Park (2002). Natural Resource Technical Report NPS/NCCN/NRTR2009/156. National Park Service, Fort Collins, CO. PDF
Siegel, R.B., R.L. Wilkerson, R.C. Kuntz II, and J. McLaughlin. 2009. Landbird inventory for North Cascades National Park Service Complex (2001-2002). Natural Resource Technical Report NPS/NCCN/NRTR¬2009/152. National Park Service, Fort Collins, CO. PDF
Siegel, R.B., Wilkerson, R.L., and R.C. Kuntz II. 2009. Landbird Monitoring in the North Coast and Cascades Network Report for the 2006 Pilot Field Season. Natural Resource Technical Report NPS/NCCN/NRTR—2009/168. PDF
Wilkerson, R.L., R.B. Siegel, and R.C. Kuntz II. 2009. Landbird monitoring in the North Coast and Cascades Monitoring Network: report for the 2008 field season. Report to the North Coast and Cascades Network of the National Park Service. The Institute for Bird Populations, Point Reyes Station, CA. PDF
Siegel, R.B., Wilkerson, R.L., and R.C. Kuntz II. 2008. Landbird Monitoring in the North Coast and Cascades Network Report for the 2007 Field Season. Natural Resource Technical Report NPS/NCCN/NRTR—2008/114. PDF
Nott, M.P. 2007. Demographics monitoring modeling and management of landbird populations in Pacific Northwest forests: an application of the MAPS dataset. The Institute for Bird Populations, Point Reyes Station, CA.
Siegel, R.B., R.L. Wilkerson, K.J. Jenkins, R.C. Kuntz II, J.R. Boetsch, J.P. Schaberl, and P.J. Happe. 2007. Landbird monitoring protocol for national parks in the North Coast and Cascades Network. U.S. Geological Survey Techniques and Methods 2-A6. PDF
Pyle, P., D.F. DeSante, M.P. Nott, and D.R. Kaschube. 2005. The MAPS Program in the Pacific Northwest: current status and future direction. Report submitted to the Bureau of Land Management, Oregon State Office for Order HAP044166. The Institute for Bird Populations, Point Reyes Station, CA. PDF
Wilkerson, R.L., R.B. Siegel, and J. Schaberl. 2005. Landbird inventory for Mount Rainier National Park (2003-2004). Natural Resource Technical Report NPS/NCCN/NRTR 2009/164. National Park Service, Fort Collins, CO. PDF
Siegel, R.B., and R.L. Wilkerson. 2004. Landbird Inventory for Olympic National Park, Final Report. The Institute for Bird Populations, Point Reyes Station, CA. PDF
Siegel, R.B. 2000. Methods for monitoring landbirds. U.S. Department of Interior National Park Service Technical Report NPS/NRNOCA/NRTR/00-03. PDF