Stunning Monarch Butterfly Sanctuary in Mexico

In this photo taken Feb. 15, 2013, Monarch butterflies are collected in a net to be tested for the ophroyocystis elektroscirrha parasite that inhibits their flight, at El Capulin reserve, near Zitacuaro, Mexico.  (AP)

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)

In this photo taken Feb. 14, 2013, Samantha Goldberger, left, who had just set her camera on a timer, is surprised by her boyfriend Jason Skipton, as he proposes marriage, at the El Capulin reserve, near Zitacuaro, Mexico.  (AP)

This photo taken Feb. 14, 2013 shows Samantha Goldberger showing off her engagement ring next to a Monarch butterfly soon after Jason Skipton proposed to her at El Capulin reserve, near Zitacuaro, Mexico.  (AP)

In this photo taken Feb. 16, 2013, a painting of a Monarch butterfly is displayed in the reception area of Rancho San Cayetano, a hotel near near Zitacuaro, in the central Mexican state of Michoacan. Visitors say San Cayetano is one of the nicest and most charming places to stay in butterfly country. It's also one of the priciest, but the manicured grounds are lush and the rooms are cozy, each with a fireplace and woodpile ready to light at night. (AP)

In this photo taken Feb. 16, 2013, University of Georgia scientist Sonia Altizer looks for signs of the ophroyocystis elektroscirrha parasite in the residue of Monarch butterflies, which attaches to the Monarchs inhibiting their flight, at El Capulin reserve, near Zitacuaro, Mexico.  (AP)

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)