The results of the 28 annual mid-season Western Monarch Count have been released: only 9,119 of the butterflies were counted during the time the overwintering population is usually at its peak. This ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording since tracking began in 1997. Biologists say record-high late summer ...

there are 80% fewer monarchs overwintering in Mexico than in the 1980s, and California wintering populations are 95% smaller than they were at that time. In response to these figures, the USFWS issued ...

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

Migrating monarchs live about ten months, summer ones about three weeks. Instead of embarking on their journey north in mid-April as they have for eons, they now leave the mountains of Mexico to the U ...

ASGA's vice president of science and innovation told sugarbeet growers the potential listing of monarch butterflies as ...

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

On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch Butterfly Count and recorded the second lowest overwintering population ...

Conservationists are concerned that western monarch butterflies may be teetering on the brink of collapse as the latest Western Monarch Count reveals a devastating decline. The 28th annual survey ...

Monarch populations east of the Rockies ... that scientists still don’t fully understand. In the spring, overwintering butterflies mate and fly north, eventually stopping to lay eggs once ...

The western monarch butterfly (Danaus plexippus) is one of North America’s most iconic insects, known for its extraordinary migration from summer breeding grounds to overwintering sites in ...