President Donald Trump’s administration has delayed a decision on whether to extend federal protections to monarch ...

This important study shows that different forms and mixtures of cardenolide toxins in tropical milkweed, especially nitrogen- and sulfur-containing types, change how monarch caterpillars eat, grow, ...

Students at K.O. Knudson Middle School have successfully convinced Las Vegas Mayor Shelley Berkley to sign the Mayor's ...

A monarch butterfly lands on milkweed at Sun Valley Elementary School in San Rafael on July 29. (Sherry LaVars/Marin Independent Journal) Caterpillars eat milkweed leaves. (AP Photo/Herald Times ...

This is the time of the year when monarch butterflies make their journey to warmer weather. “The monarch butterfly is one of the few, that we know, that engage in this migratory behavior,” said David ...

A Conneaut Valley kindergarten class observed the life cycle of monarch caterpillars with help from a local enthusiast. Monarch caterpillars exclusively eat milkweed and go through five molting stages ...

SALISBURY — Last weekend, Salisbury had a hand in one of the largest natural migrations taking place across the U.S., and it happened in a flutter. Hurley Park hosted the annual monarch butterfly ...

The Richland Soil and Water Conservation District is collecting milkweed seed pods to help support the declining monarch butterfly population. Milkweed is the only plant monarch butterflies will lay ...

Q: I spotted some monarch caterpillars yesterday on my common milkweed (see reader's photos). Seems late for them so I hope they will survive. A: Monarchs start migrating south from September through ...