The first monarch butterflies have arrived at their wintering grounds in the mountains of central Mexico almost a week later than usual, Mexico's Environment Department said Wednesday.
Deforestation in the core zone of the Monarch Butterfly Biosphere Reserve in Mexico decreased by 57.6 per cent, from 15.8 hectares lost during the 2016-2017 period to to 6.7 hectares in 2017 -2018.
A new study conducted at the University of Michigan reveals a previously unrecognized threat to monarch butterflies: Mounting levels of atmospheric carbon dioxide reduce the medicinal properties of milkweed plants that protect ...
After five years and nearly 15,000 tagged butterflies, scientists now have proof that Monarch butterflies migrate from the Pacific Northwest to California in late summer and fall, a journey averaging nearly 500 miles.
LSU researchers have discovered a new relationship between climate change, monarch butterflies and milkweed plants. It turns out that warming temperatures don't just affect the monarch, Danaus plexippus, directly, but also ...
The number of monarch butterflies wintering in Mexican forests declined for a second consecutive year, a government official said Monday.
Naturalists' records dating back more than 100 years may be instrumental in determining the fate of the monarch butterfly in the 21st century.
A new University of Guelph study reveals that not all milkweed plants are the same for endangered monarch butterflies looking to lay their eggs.
Monarch butterflies, those delicate symbols of spring and summer, should mostly be in Texas by now, winging their way to Mexico for the winter.
A lacy, cloud-like pattern drifting across a Denver-area radar screen turned out to be a 70-mile-wide (110-kilometer) wave of butterflies, forecasters say.