As monarch butterflies vanish, researchers investigate road salt as culprit and cure
(PHYSorg.com Biology)

A monarch butterfly had just emerged from its chrysalis when Emilie Snell-Rood reached into its cage, grabbed it carefully to take measurements and photographs, then placed it inside a tall and breezy tent. There it would strengthen its wings for a day or two in relative safety before being released in time to begin a 2,000-mile trek to southern Mexico.