The U.S. Fish and Wildlife Service has proposed listing the monarch butterfly as a threatened species. Here's what happens ...

Van der Heide got her start at Cal Poly, tagging monarchs by numbering their wings in Sharpie and trying to find them later ...

For the past three years, more than 200,000 western monarch butterflies spent their winters along the California coast — huddling together in tall tree groves, finding respite from the wind from ...

The iconic monarch butterfly is declining across North America. You can help make a difference by providing the species with its food plant: milkweed. A monarch butterfly gliding over a field on ...

From 2003 to 2019, amateur butterfly enthusiast Harlan Radcliff spent his lunch breaks observing butterflies on the grounds of the Camp Dodge military installation in central Iowa. Diane Debinski, ...