'It's a sad reality': a troubling trend sees a 97% decline in monarch butterflies

In the 1980s, roughly 4.5 million monarchs wintered in California, but at last count, there may be as few as 30,000

The hillside groves of eucalyptus trees that tower over the Santa Cruz shoreline would, not so long ago, be teeming with monarch butterflies at this time of year.

Boughs would be bent under the weight of black and orange clusters, as hundreds of thousands of the magical invertebrates nestled into the leaves, waiting out the frost on the California coast before returning north.