What does a cicada invasion sound like? According to 911 calls pouring in across the country, it sounds a lot like an alarm going off. An estimated trillion cicadas have surfaced along the East Coast for mating season after 17 years of hibernation. But some Americans are seeing the positive side of the cicada invasion. Would you eat a cicada taco? Chef Tobias Padovano has been serving up cicada tacos at his restaurant in Leesburg, Virginia.