Milkweed plants, which monarch larvae and caterpillars feed on, have been torn out for sidewalks, tennis courts and crops. Some of the flowering plants that remain are covered in harmful pesticides.

Monarch butterflies could soon be added to the federal Endangered Species list, with a decision expected by year's end.

The monarch butterfly life cycle begins with a whirl of wings in the heat of the summer sun. As a female monarch sips nectar ...

The iconic Western Monarch Butterfly historically migrated in the tens of thousands to the Goleta area, but this year, the ...

Monarch butterflies are important culturally and ecologically across North America. Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and-gold chrysalises and ...

The monarch butterfly is widely recognized and widely dispersed across North America and it's in trouble. Federal officials ...