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

This year the organization counted 9,119 monarchs, the second-lowest total since tracking began in 1997. The organization has ...

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

Thogmartin and other researchers have evaluated more than 200 scenarios for restoring greater than 1.3 billion stems of ...

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

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

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

Overwintering populations of monarch butterflies in California have reached a near all-time low since records began, conservationists announced on Thursday. The ...

Here's what to know: Monarch butterflies, known for their distinctive orange-and-black wings, are found across North America. Monarchs in the eastern United States spend their winters in Mexico ...

Monarch butterflies, known for their distinctive orange-and-black wings, are found across North America. The survey noted that a site owned by The Nature Conservancy in Santa Barbara that saw ...

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing habitat and climate ...