<p>Cicadas are large, loud insects that spend their nymphal stages underground until they crawl out, climb a tree trunk, and emerge as winged insects. They have 1-year (annual) and 13- or 17-year (periodical) life cycles. Yearly emergences are consistent and plentiful in certain places to become a dependable ¿hatch¿¿fish key in on them when they fall into the water and become easy meals. Everything from carp and smallmouth on Eastern rivers to trout on fabled waters such as Utah¿s Green River or Wyoming¿s Wind River grow fat on this annual feast.</p><p>But the feeding frenzy kicks into high gear every three or four years when periodical cicadas emerge. These insects have been underground for 13 or 17 years (identified by different brood names) and emerge en masse in mind boggling numbers. Many of them take to trees along highways or deep in the woods where their call is deafening, and everything from birds to snakes to turkeys feed voraciously on them. Many of them also emerge at the b