Peer-reviewed published literature which uses the Thanksgiving Count dataset
Schultz, C.B., L.M. Brown, E. Pelton, and E.E. Crone. 2017. Citizen science monitoring demonstrates dramatic declines of monarch butterflies in western North America Biological Conservation. 214:343-346.
Espeset, A.E., J.G. Harrison, A.M. Shapiro, C.C. Nice, J.H. Thorne, D.P. Waetjen, J.A. Fordyce, and M.L. Forister. 2016. Understanding a migratory species in a changing world: climatic effects and demographic declines in the western monarch revealed by four decades of instensive monitoring. Oecologia. 2016 Mar 21:1-2.
Jepsen, S. and S.H. Black. 2015. Understanding and conserving the western North American monarch population. In Oberhauser, K.S., K.R. Nail, and S.M. Alitizer, eds. Monarchs in a Changing World: Biology and Conservation of an Iconic Insect. Ithaca, USA: Cornell University Press.
Ries, L. and K. Oberhauser. 2015. A citizen army for science: quantifying the contributions of citizen scientists to our understanding of monarch butterfly biology. BioScience 65: 419-430.
Stevens, S.R. and D. Frey. 2010. Host plant pattern and variation in climate predict the location of natal grounds for migratory monarch butterflies in western North America. Journal of Insect Conservation 14: 731-744.
Vandenbosch, R. 2007. What do monarch population time series tell us about eastern and western population mixing? Journal of the Lepidopterists’ Society 61(1): 28-31.
Koenig, W. 2006. Spatial synchrony of monarch butterflies. The American Midland Naturalist 155(1): 39-49.
Frey, D. and A. Schaffner. 2004. Spatial and temporal patterns of monarch overwintering abundance in Western North America. In Oberhauser, K.S. and M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Ithaca: Cornell University Press.
Resources for Overwintering Site Management and Protection
The Xerces Society. State of the Monarch Butterfly Overwintering Sites in California. This report builds upon data collected at over 400 overwintering sites in California including population trends and habitat conditions. A top 50 list prioritizes sites for protection and active management, with conservation profiles for the top 25 sites.
Bell, E., L.P. Brower, W.H. Calvert, J. Dayton, D. Frey, K. Leong, D. Murphy, R.M. Pyle, W. Sakai, K.B. Snow, and S. Weiss. 1993. The Monarch Project’s conservation and management guidelines for preserving the monarch butterfly migration and monarch overwintering habitat in California. A guide for land managers and community activists.