In 2023, more than 16,000 butterflies were counted at one local grove. The most recent count was a tiny fraction of that.
Scientists are grappling with a stark population decline of the western monarch butterfly after the species’ numbers hit a ...
On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch ...
Western Monarch Count observed a peak population of 9,119 Monarch butterflies in California this winter, marking a sharp decline in the last few years. The count, administered by ...