Have found the following article in one of our local posts. Ear muffs will be required: 105 dB
Sifting through a shovel load of dirt in a suburban backyard, US couple Michael Raupp and Paula Shrewsbury find their quarry: a cicada nymph.
And then another. And another. And four more.
In maybe a third of a square foot of dirt, the University of Maryland entomologists find at least seven cicadas, a rate just shy of a million per acre.
A nearby yard yielded a rate closer to 1.5 million.
And there's much more afoot.
Trillions of the red-eyed black insects are coming, scientists say.
Within days, a couple of weeks at most, the cicadas of Brood X (the X is the Roman numeral for 10) will emerge after 17 years underground.
There are many broods of periodic cicadas that appear on rigid schedules in different years, but this is one of the largest and most noticeable.
They’ll be in 15 states from Indiana to Georgia to New York; they’re coming out now in mass numbers in Tennessee and North Carolina.
When the entire brood emerges, backyards can look like undulating waves, and the bug chorus is lawnmower loud.
The cicadas will mostly come out at dusk to try to avoid everything that wants to eat them, squiggling out of holes in the ground.
They’ll try to climb up trees or anything vertical, including Mr Raupp and Ms Shrewsbury.
Once off the ground, they shed their skins and try to survive that vulnerable stage before they become dinner to a host of critters including ants, birds, dogs, cats and Mr Raupp.
It’s one of nature’s weirdest events, featuring sex, a race against death, evolution and what can sound like a bad science fiction movie soundtrack.
America is the only place in the world that has periodic cicadas that stay underground for either 13 or 17 years, says entomologist John Cooley of the University of Connecticut.
The bugs only emerge in large numbers when the ground temperature reaches 18 degrees.
That’s happening earlier in the calendar in recent years because of climate change, says entomologist Gene Kritsky. Before 1950 they used to emerge at the end of May; now they’re coming out weeks earlier.
Cicadas who come out early don’t survive. They’re quickly eaten by predators.
Cicadas evolved a key survival technique: overwhelming numbers.
https://www.9news.com.au/world/trillions-of-redeyed-cicadas-about-to-emerge-after-17-years-underground/9e8e9146-6129-49a4-be59-fc5cfbfccd71