Brood X is coming. In fact, by many accounts the invasion has already begun. The emergence of Magicicada septendecim; a species of 17-year periodical cicadas; the largest periodical emergence of insects on Earth.
Periodical cicadas are large, fat, dark brown, flying insects averaging about 1 1/2 inches in length, with a 3 inch wingspan. Pigmented veins form a noticeable ‘W’ on the outer end of their front wings. Their eyes are bright red.
Different broods of periodical cicadas emerge at different intervals. Some appear annually, some at 2 and 4 year cycles, others every 13 or every 17 years. According to Jody L. Gangloff-Kaufmann, a Cornell Entomologist working in community (non-agricultural) integrated pest management (IPM), Brood X (broods are labeled with Roman numerals), sometimes referred to as the Great Eastern Brood, “is one of 15 broods of periodical cicadas that appear regularly throughout the eastern United States.” Each one is distinctly different.