Cicadas Swarm And Copperheads: Yes, It's A Thing In Maryland

MARYLAND — Marylanders may have different views about the billions of Brood X17-year cicadas that will emerge next month — some see the deafening noise and insects as pests, even as experts say they're an edible snack.

But copperheads will be happy to see them because the insects will provide a quick meal.

The venomous snakes found in many of the same states, including Maryland, where billions of cicadas will emerge later this spring. So if you plan an outing to listen to the cacophony set up by these creatures, be careful no copperheads are slithering nearby.

Billions of the 17-year periodical cicadas — Brood X, otherwise known as the Great Eastern Brood this year — are due to emerge in 15 U.S. states in May, give or take a few weeks.

The synchronized emergence of periodical cicadas, which have the longest life cycle of any known insect, still baffles scientists. But one evolutionary hypothesis is that the forced developmental delay was an adaptation to climate cooling during the ice ages.

There are two species of periodical cicadas — the 17-year cicadas, found in Northern states, and the 13-year cicadas, found in the South.

Related:

• You Can Eat 17-Year Cicadas As They Emerge In Maryland
• Billions Of 17-Year Cicadas Will Emerge; MD Epicenter In 2021

Copperheads, a close relative of the cottonmouth or water moccasin, are found in forested rock outcrops of central and western Maryland. The Department of Natural Resources said the snakes are found throughout Maryland except for several counties on the Eastern Shore.

Dr. Michael Raupp, known for his Bug Guy blog and a professor emeritus of entomology at the University of Maryland, said parts of Maryland, Virginia and the District of Columbia will witness the spectacle.

"Maryland is at the epicenter of the cicada emergence, so there will be spectacular numbers of cicadas emerging very heavily, starting perhaps in early May," Raupp told WJLA. "But the big 'cicada-palooza' is going to happen the last two weeks of May and into early June. So in some areas, there will be 1.5 million cicadas per acre emerging from the ground."

Researchers have said that in our state, they'll be in Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Garrett, Harford, Howard, Montgomery, Prince George's and Washington counties.

Cities likely to see and hear the invasion of bugs include Annapolis, Baltimore, Bel Air, Bethesda, Bowie, Brooklyn Park, Catonsville, Chevy Chase, College Park, Columbia, Cockeysville, Crofton, Eldersburg, Elkridge, Ellicott City, Fallston, Gaithersburg, Gambrills, Germantown, Glen Burnie, Greenbelt, Hanover, Havre De Grace, Hyattsville, Landover Hills, Laurel, Lutherville, Odenton, Owings Mills, Pikesville, Potomac, Randallstown, Reisterstown, Riverdale, Rockville, Severna Park, Silver Spring, Takoma Park, Timonium, Towson, and Wheaton.

Raupp also said cicadas are good protein snacks for humans; his students have come up with recipes using the critters.

Shy and reclusive copperheads come out of their figurative shells when the cicadas emerge. The snakes exploit the insect emergence as a smorgasbord requiring no more effort than simply showing up.

Cicadas are a "pretty easy snack" for the copperheads, Stephen Richter, an Eastern Kentucky University biology professor, told Tulsa World in 2019.

He and his students were working with the U.S. Forest Service in Daniel Boone National Forest at the time, looking at what the federal agency saw as a potential conflict and threat to campers: the convergence of copperheads and emerging cicadas.

Amateur photographer Charlton McDaniel of Fort Smith, Arkansas, snapped a picture of a copperhead devouring a cicada.

"It jumped pretty good at first," he told Tulsa World, explaining he tried to shoo the snake away with a stick, but it was persistent, and took the long way around to get the prize.

"I had no idea about the copperheads-and-cicadas thing until this happened," he said.

With their retractable hypodermic fangs, these pit vipers are more than capable of delivering a debilitating, venomous strike to most prey.

"Why would such a well-armed predator bother to dine on cicadas?" writer Andy Gluesenkamp asked in a 2016 issue of Texas Parks and Wildlife magazine. "For the same reason we eat fast food: It's cheap and easy. Cicadas can occur in high densities, and they offer no defense of their fat-and-protein-filled bodies other than a crunchy exoskeleton."

Copperheads aren't particularly aggressive, though they'll strike defensively. Experts say most copperhead bites occur as a result of accidental encounters.

Copperhead bites are rarely deadly. Their venom isn't the most potent of venomous snakes, and is hemolytic, which means it breaks down blood cells, according to a National Geographic species profile.

When cicadas emerge, the males all tune up in a species-wide mating call that can reach up to 100 decibels. Think of a Harley-Davidson motorcycle with straight pipes constantly running outside your window.

Newly adult cicadas are in a rush to mate because they don't live very long after that — three, maybe four, weeks. The females can't produce the same sounds. They wait quietly to do their job in perpetuating the species, which is to lay as many eggs as possible, up to 600 over their short lifetime.

After mating, the females split the bark on living tree trunks, branches and twigs, burrow in and lay between 24 and 48 eggs at a time.