Some milkweed plants are poisonous to cattle. Monarch butterflies help reduce the amount of these plants.
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Appears under "Benefits"
©1995-2012, The Regents of the University of Michigan and its licensors
© The Regents of the University of Michigan and its licensors
Animal Diversity Web
Ethan Kane, University of Michigan
Kane, E. 1999. "Danaus plexippus" (On-line), Animal Diversity Web. Accessed September 16, 2012 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Danaus_plexippus.html
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