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Davis, A.K., and E.

Davis, A.K., and E. Howard. 2005. Spring recolonization rate of monarch butterflies in eastern North America: new estimates from citizen-science data. Journal of the Lepidopterists’ Society 59:1–5. Available from Davis.pdf (accessed March 25, 2014). Davis, A.K., N.P. Nibbelink, and E. Howard. 2012. Identifying Large- and Small-Scale Habitat Characteristics of Monarch Butterfly Migratory Roost Sites with Citizen Science Observations. International Journal of Zoology 2012:1–9. Available from (accessed August 29, 2013). Davis, A.K., and E. Rendon-Salinas. 2010. Are female monarch butterflies declining in eastern North America? Evidence of a 30-year change in sex ratios at Mexican overwintering sites. Biology Letters 6:45–47. Available from (accessed March 25, 2014). de Roode, J.C., J. Chi, R.M. Rarick, and S. Altizer. 2009. Strength in numbers: high parasite burdens increase transmission of a protozoan parasite of monarch butterflies (Danaus plexippus). Oecologia 161(1): 67-75. de Roode J.C., L.R. Gold, S. Altizer. 2007. Virulence determinants in a natural butterfly–parasite system. Parasitology 134:657–668. de Roode, J.C., A.J. Yates, and S. Altizer. 2008. Virulence-transmission trade-offs and population divergence in virulence in a naturally occurring butterfly parasite. Proceedings of the National Academy of Sciences 105(21): 7489-7494. Dickman, C.R., 2007. A Fragile Balance. The Extraordinary Story of Australian Marsupials. Craftsman House, Melbourne. Dingle, H., M.P. Zalucki, W.A. Rochester, and T. Armijo-Prewitt. 2005. Distribution of the monarch butterfly, Danaus plexippus (L.)(Lepidoptera: Nymphalidae), in western North America. Biological Journal of the Linnean Society 85:491–500. Available from (accessed August 29, 2013). DiTommaso, A., and J.E. Losey. 2003. Oviposition preference and larval performance of monarch butterflies (Danaus plexippus) on two invasive swallow-wort species. Entomologia Experimentalis et Applicata 108:205–209. Available from (accessed June 11, 2013). Dockx, C. 2002. Migration of the North American Monarch Danaus plexippus to Cuba. Ph.D. University of Florida. Monarch ESA Petition 122

Dockx, C. 2007. Directional and stabilizing selection on wing size and shape in migrant and resident monarch butterflies, Danaus plexippus (L.), in Cuba. Biological Journal of the Linnean Society 92:605–616. Available from 8312.2007.00886.x/full (accessed June 11, 2013). Dockx, C. 2012. Differences in phenotypic traits and migratory strategies between eastern North American monarch butterflies, Danaus plexippus (L.). Biological Journal of the Linnean Society 106:717–736. Available from 8312.2012.01916.x/full (accessed June 11, 2013). Dodds, D.M., J.T. Irby, J.A. Huff, D.B. Reynolds. 2007. Assessment of glyphosate drift on corn (Zea mays) utilizing multispectral aerial imagery. Abstract of presentation at the Weed Science Society of America Annual Meeting, 2007, Abstract 7. (accessed August 20, 2014). Doll, J. 1998. How weeds have changed over 20 years. Proceedings of the Wisconsin Fertilizer, AgLime, and Pest Management Conference, Vol. 37: 144-147. Doll, J. D. 2001. Transgenic crops: are milkweeds and butterflies in trouble? Available from (accessed May 31, 2013). Doohan, D. and Mohseni-Moghadam. 2014. Response of broccoli and pepper to simulated drift of 2,4-D and dicamba. Weed Science Society of America Annual Meeting, 2014. Duke, S.O., A.L. Cerdeira, and M.B. Batallo. 2007. Herbicide effects on plant disease. Outlooks in Pest Management 18(1): 36-40. Duke, S.O. and S.B. Powles. 2008. Glyphosate: a once-in-a-century herbicide. Pest Management Science 64: 319-325. Dukes, J.S. and H.A. Mooney. 1999. Does global change increase the success of biological invaders? Trends in Ecology and Evolution 14(4): 135-139. D'urban, W.S.M. 1857. Article 31. Description of four species of Canadian butterflies, continued. Canadian Naturalist and Geologist 2(5):345-355. Egan, J.F., K.M. Barlow, and D.A. Mortensen. 2014a. A Meta-Analysis on the Effects of 2,4-D and Dicamba Drift on Soybean and Cotton. Weed Science 62:193–206. Available from (accessed January 22, 2014). Egan, J.F., E.Bohnenblust, S. Goslee, D. Mortensen, and J. Tooker. 2014b. Herbicide drift can affect plant and arthropod communities. Agriculture, Ecosystems & Environment 185:77–87. Available from (accessed January 22, 2014). Monarch ESA Petition 123

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