Feb 19, 2015
Monarch population is nearly flat but greatly reduced from previous decades. Pestacides in your garden could be lethal to monarch caterpillars nearby. Interstate 35 is becoming the Monarch highway. Milkweed in my backyard. Where are the monarchs vacationing in Mexico?
Sources:
The Washington Post - http://www.washingtonpost.com/news/energy-environment/wp/2015/02/09/the-monarch-massacre-nearly-a-billion-butterflies-have-vanished/
Western population numbers - http://monarchjointventure.org/news-events/news/western-overwintering-population-2014-15
RoundUp - http://darwin.bio.uci.edu/sustain/global/sensem/burry298.html
Monarch Watch Population Status - http://monarchwatch.org/blog/2015/01/27/monarch-population-status-22/
Winter roosting sites in Mexico - http://www.learner.org/jnorth/tm/monarch/PopulationMexicoSites.html