Millions of monarchs inhabit butterfly country

In this photo taken Feb. 15, 2013, researchers from the University of Georgia and University of Minnesota select Monarch butterflies to be tested for the ophryocystis elektroscirrha parasite that attaches to the butterflies and inhibits their flight, at El Capulin reserve, near Zitacuaro, Mexico. (AP Photo/Marjorie Miller)

In this photo taken Feb. 15, 2013, researchers from the University of Georgia and University of Minnesota select Monarch butterflies to be tested for the ophryocystis elektroscirrha parasite that attaches to the butterflies and inhibits their flight, at El Capulin reserve, near Zitacuaro, Mexico. (AP Photo/Marjorie Miller)