Monarch butterfly population in Western U.S. nears record 30-year low

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

Monarch butterfly population in Western U.S. nears record 30-year low
The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend protections for the insect.