The monarch population west of the Rocky Mountains, which overwinters on the California coast, is also in great peril, having declined by 95% over two decades. Numbering some 1.2 million in the 1990s ...

The monarch population west of the Rocky Mountains, which overwinters on the California coast, is also in great peril, having declined by 95% over two decades. Numbering some 1.2 million in the 1990s ...

Colony estimates at central Mexico overwintering sites indicate that monarch butterfly (Danaus plexippus ... butterfly's overwintering sites Climate change punctuated by episodic extreme weather ...

This is looking to be the second-lowest year that I have seen in my entire lifetime,” one State Parks employee said.

However, over the past 20 years, the monarch butterfly population has declined by more than 80 percent throughout much of its range. Several other pollinators have experienced similarly dramatic ...