The Secret in the Spots on #MonarchButterflies’ #Wings. The wings of monarchs that survive a 2,000-mile-long #migration tend to be spottier, suggesting that feature may aid the insects’ ability to fly. These insects flap more than 2,000 miles from their summer homes in #Canada down to mountains of central #Mexico. Only about 30% survive the trip. Researchers have found shared #trait in the #butterflies that make it: The edges of their wings tend to be slightly #spottier. https://www.nytimes.com/2023/06/21/science/monarch-butterflies-spots-wings.html