Frankenfood and pesticides claiming the Monarch Butterfly.

"The study, published today in the Journal of Animal Ecology, shows this decline in milkweed is the main cause of the monarch's recent population decline, not deforestation in Mexico. If this milkweed loss continues, the study predicts, monarch populations will fall at least another 14 per cent and there is a five per cent chance they will be driven nearly to extinction over the next century .

Study co-author Ryan Norris, a biology professor at the University of Guelph, said that "likely the biggest cause of loss of milkweed is the adoption of genetically modified crops."

Farmers have been increasingly planting corn and soybeans resistant to herbicides, and then applying those herbicides liberally on their fields. That kills off plants between the rows of crops that aren't resistant, such as milkweed."

http://www.cbc.ca/news/technology/monarch-butterfly-decline-linked-to-spread-of-gm-crops-1.2665131