Retired schoolteacher Tachi Dellinger pointed inside a mesh box, where three green chrysalises hung. “This one is starting to change color,” Dellinger said. “It will turn jet black ... when it's ready ...

The monarch butterfly life cycle begins with a whirl of wings in the heat of the summer sun. As a female monarch sips nectar from a wildflower, a male hovers nearby. A pheromone is released from tiny ...

Each year, there are four generations of monarch butterflies that take part in the migration north in the spring and summer, then south again in the fall. Each generation takes a leg of the journey ...

Monarch butterfly populations have nearly doubled this year, an annual survey of the species found. At the end of each summer, the beloved pollinators migrate from southern Canada and the northern and ...