Brood XIXとは 意味・読み方・使い方

Brood XIX (also known as Brood 19 and The Great Southern Brood) is the largest (most widely distributed) brood of 13-year periodical cicadas, last seen in 1998 and reappearing in May and June of 2011 across a wide stretch of the southeastern United States. Periodical cicadas (Magicicada spp.) are often referred to as "17-year locusts" because most of the known distinct broods have a 17-year life cycle. Brood XIX is one of only three surviving broods with a 13-year cycle. It is also notable because a it includes four different 13-year species, one of which was discovered in Brood XIX in 1998 by scientists' listening to cicada songs.