Fyi...

Plan to save monarch butterflies backfires

By Lizzie Wade 13 January 2015

That’s because people have been planting the wrong species of milkweed, thereby increasing the odds of monarchs becoming infected with a crippling parasite.

http://news.sciencemag.org/biology/2015/01/plan-save-monarch-butterflies-backfires
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Arty turns 11 this summer.