The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...

The natural phenomenon of the iconic monarch butterflies migrating south for the winter is a fascinating one - and it's one ...

The number of brown hairstreak butterflies on a nature reserve is stable, a wildlife trust says.

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

The number of rare butterflies found on a nature reserve ... hairstreak butterfly eggs at Asham Meads in Oxfordshire. The species is found in select areas across the south of Britain and is ...

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in ...

Scientists are grappling with a stark population decline of the western monarch butterfly after the species’ numbers hit a ...

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