The main basis for the proposal to list monarchs as threatened is that researchers are seeing fewer of the butterflies each year at their overwintering sites. There’s little debate that the monarch’s ...

Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and-gold chrysalises and emerge as large orange-and-black butterflies. Monarch's multigenerational migration ...

A monarch butterfly feeds at Cape May Point State Park in Lower Township, N.J., Wednesday, Oct. 14, 2020.Get Photo Monarch butterflies roost as the sun begins to set at The Nature Conservancy's ...

The monarch butterfly population continues to shrink due to factors such as climate change. People working to help the species say proposed federal protections could boost existing efforts.

Mexico's monarch migration arrived late this year but in greater numbers, say caretakers at the Monarch Butterfly Biosphere ...

Migration for monarch butterflies is already perilous in the best conditions. It takes multiple generations of monarchs to reach their migratory destination with abundant resources. Now ...