Monarch butterfly population in Western U.S. nears record 30-year low. Here’s what to know.
The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing habitat and climate change take their toll on the beloved pollinator. Here’s what to know: Endangered species Monarch butterflies, known for their distinctive orange-and-black wings, are found across North…