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A large population of already vulnerable monarch butterflies are stuck in Canada. (Photo credit: AP)

Rising carbon dioxide levels pose threat to monarch butterflies

The study looked at how elevated CO2 levels alter plant chemistry and how that affects interactions between monarchs and...

11 July 2018 3:26 PM IST

The monarchs were preparing to fly back to the U.S. and Canada at the time the storm hit and that caused the decrease in their number. (Photo: Pixabay)

Monarch butterfly numbers drop by 27 percent in Mexico

The number reduced because the area was hit by the biggest storm after 2009-10 in their usual migratory area

10 Feb 2017 6:55 PM IST