More than 40 percent of the world's insects could go extinct in the next few decades, according to a report that lead author Francisco Sánchez-Bayo told CNN was the first global review of the threats facing the class that makes up 70 percent of earth's animals.
A third of insects are endangered species, and they are going extinct at a rate eight times that of birds, mammals and reptiles. That amounts to a loss of 2.5 percent of insect mass every year over the last three decades.
The population of monarch butterflies that spend winter along the California coast dropped 86 percent since 2017, according to a recent count by the Xerces Society, an invertebrate conservation group.
Preliminary results from the Western Monarch Thanksgiving Count, an annual citizen science program, recorded less than 30,000 butterflies overwintering in California, a significant decline from the estimated 192,000 in 2017. The official numbers will be released later this month.
The National Butterfly Center in Mission, Texas is the most diverse butterfly sanctuary in the U.S. Some 200 species of butterflies find a home there each year, including the Mexican bluewing, the black swallowtail and the increasingly imperiled monarch. And, as soon as February, almost 70 percent of it could be lost to President Donald Trump's border wall, The Guardian reported Thursday.