In this Feb. 15, 2013 photo, a scientist collects a Monarch butterfly to be tested for the ophryocystis elektroscirrha parasite that inhibits their flight, at El Capulin reserve, near Zitacuaro, Mexico. (AP Photo/Marjorie Miller)
In this Feb. 15, 2013 photo, a scientist collects a Monarch butterfly to be tested for the ophryocystis elektroscirrha parasite that inhibits their flight, at El Capulin reserve, near Zitacuaro, Mexico. (AP Photo/Marjorie Miller)