The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven ...

The findings challenge previous assumptions about butterfly migration and highlight the role of phenotypic plasticity.

Growing milkweed from seed is one of the easiest ways to help declining monarch butterflies. In December 2024, the U.S. Fish ...

The Western population of the monarch butterfly hit a near-record low with fewer than 10,000 found living in California this ...

Once, millions of monarchs wintered in California. But climate change, habitat loss, widespread pesticide use and disease ...

Just over 9,000 monarchs were counted in California last winter, the second lowest ever since the annual count began in 1997 ...

This winter, volunteers from the Xerces Society, a nonprofit environmental group, tallied just 9,119 western monarchs — a ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording ...

The number of monarch butterflies spending the winter in the western United States dropped dramatically this year even as ...

We know small populations are especially vulnerable to environmental fluctuations, and we think that’s what happened this ...

A recent study provides insights into the life history and behaviour of the endemic Cape Autumn Widow butterfly (Dira clytus), a species endemic to South Africa.

The monarch butterfly is known by scientists as Danaus plexippus, which in Greek literally means "sleepy transformation." The name evokes the species' ability to hibernate and metamorphize. Adult ...