Mayfly numbers drop by half since 2012, threatening food chain

Every summer, mayflies burst forth from lakes and rivers, taking to the skies of North America. These insects, which are particularly abundant in the northern Mississippi River Basin and Great Lakes, live in the water as nymphs before transforming into flying adults. They synchronize their emergence to form huge swarms of up to 80 billion …

Mayfly numbers drop by half since 2012, threatening food chain Read More »