milkweed

Captive-bred monarchs don’t migrate

July 5, 2019

When either breeders or eager citizens raise monarch butterflies, they may be raising individuals that can’t migrate, according to new research. The idea to study ...

Mowing for monarchs

April 16, 2019

It may seem like taking a weed wacker to perennial grasslands where monarch butterflies (Danaus plexippus) feed on their only food source, milkweed, is not the best ...

West Coast monarchs face steep decline

October 5, 2017

Monarch butterflies that overwinter on the West Coast of North America have declined from the millions 30 years ago to only 300,000 today, according to new ...