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Thanks for posting this , it brought back memories of a holiday we had in Virginia a few years back , just at the time these 17 year ones emerged , a great sight to see .

Naughty David , clicking his fingers and getting that male going . :)
 

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Discussion Starter · #6 ·
Does anyone know why this year there seems to be an abundance of them?
It has to do with their life-cycle. From Wiki

"icadas live underground as nymphs for most of their lives, at depths ranging from about 30 centimetres (0.98 ft) down to 2.5 metres (8.2 ft). The nymphs feed on xylem sap from roots and have strong front legs for digging.

In the final nymphal instar, they construct an exit tunnel to the surface and emerge. They then moult (shed their skins) on a nearby plant for the last time and emerge as adults. The exuvia, or abandoned exoskeleton, remains, still clinging to the bark of trees.

After mating, the female cuts slits into the bark of a twig, and into these she deposits her eggs. She may do so repeatedly, until she has laid several hundred eggs. When the eggs hatch, the newly hatched nymphs drop to the ground, where they burrow. Most cicadas go through a life cycle that lasts from two to five years. Some species have much longer life cycles, such as the North American genus, Magicicada, which has a number of distinct "broods" that go through either a 17-year or, in some parts of the world, a 13-year life cycle. These long life cycles perhaps developed as a response to predators, such as the cicada killer wasp and praying mantis.[21][22][23] A predator with a shorter life cycle of at least two years could not reliably prey upon the cicadas.[24]"
 

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