And Illinois is largely responsible.
When the farmers decided gmo'd soybeans was their new cash cow, the monarchs got screwed. 😡
Other factors include land development and climate change.
Now Illinois has put several initiatives in place to increase the monarch population. That's wonderful, but we still need to be concerned with the increasing human population. Between the monarch initiatives and human overpopulation, it'll cancel each other out. You may never see monarchs by "the thousands" ever again.