US butterfly populations drop by 22% in two decades, study says newsthirst.
Maddie Molloy BBC Climate & Science Jack Cochran The Danaus eresimus, commonly known as the soldier butterfly, is among the 20 butterfly species experiencing the steepest decline Butterfly populations in the US shrank by more than a fifth within the space of two decades, according to a new study. Numbers fell by 22% between 2000…