Cicada Mania

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Brood X (Ten) is a brood of Magicicada (genus) periodical cicadas located in DE, GA, IL, IN, KY, MD, MI, NC, NJ, NY, OH, PA, TN, VA, WVA, and Washington DC. It has a 17-year life cycle. The next time the brood will emerge is 2021.

April 18, 2020

Periodical cicada Brood X (10) will emerge in 15 states in 2021

Filed under: Brood X,Magicicada,Periodical — Dan @ 1:01 am

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Some Brood X “stragglers” emerged early in 2020. See where on the map below:
May 30 map - Now with Brood V
If you see a cicada and want to report it, the Cicada Safari App is available for Android and Apple devices 📱.

Periodical cicada Brood X (10) will emerge in the spring of 2021 in Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, North Carolina, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Washington D.C.

The last time this brood emerged was in 2004.

What, when, where, and why:


Billions of these:

Adult, Nymph, Molting Cicada

  • Cicada insects with a 17-year life cycle.
  • Some people call them “locusts” but they’re really cicadas.
  • Which species: All three 17-year species, Magicicada septendecim, Magicicada cassini and Magicicada septendecula. How to tell the difference between the species.
  • NOT the green ones that arrive annually.

When: Typically beginning in mid-May and ending in late June. These cicadas will begin to emerge approximately when the soil 8″ beneath the ground reaches 64 degrees Fahrenheit. A nice, warm rain will often trigger an emergence. Back in 2004, people began reporting emergences around May, 13th.

Other tips: these cicadas will emerge after the trees have grown leaves, and, by my own observation, around the same time Iris flowers bloom:

Magicicada on an iris flower in Scotch Plains by Judy Lanfredi

Magicicada on an iris flower in Scotch Plains by Judy Lanfredi

Where: has the most up to date maps.

Places = cities, towns, communities, parts, etc. where people told us they emerged back in 2004.

  • Delaware counties: Kent, Sussex
  • Delaware places: Newark, Wilmington
  • Georgia counties: Union, White
  • Georgia places: Blairsville, Ellijay, Norcross
  • Illinois counties: Edgar, Clark, Crawford, Vermilion
  • Illinois counties: Marshall
  • Indiana counties: Brown, Clark, Clay, Crawford, Daviess, Dearborn, Dubois, Fountain, Gibson, Greene, Jackson, Jefferson, Jennings, Lawrence, Martin, Monroe, Montgomery, Orange, Owen, Parke, Perry, Pike, Ripley, Spencer, Sullivan, Vanderburgh, Vigo, Warrick
  • Indiana places: Bloomington, Brookville, Clinton Falls, Dillsboro, Fishers, French Lick, Indianapolis, Lawrenceburg, Lexington, Martinsville, McCormick’s Creek State Park, Nashville, North Vernon, Skiles Test Park, Spencer
  • Kentucky counties: Boone, Breckenridge, Bullitt, Carroll, Daviess, Gallatin, Grayson, Henry, Jefferson, La Rue, McLean, Muhlenberg, Nelson, Ohio, Oldham, Trimble
  • Kentucky places: Big Bone Lick State Park, Covington, Dayton, Florence, Ft. Thomas, Hebron, Louisville.
  • Maryland counties: Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Garrett, Harford, Howard, Montgomery, Prince Georges, Washington
  • Maryland places: Abingdon, Annapolis, Aspen Hill, Baltimore, Bel Air, Beltsville, Bethesda, Bowie, Brooklandville, Brooklyn Park, Catonsville, Chevy Chase, Clinton, College Park, Columbia, Crofton, Cumberland, District Heights, Eldersburg, Elkridge, Elkton, Ellicott City, Fair Hill, Fallston, Forestville, Gaithersburg, Gambrills, Germantown, Glen Burnie, Glenelg, Greenbelt, Gwynn Oak, Hagerstown, Hanover, Havre De Grace, Hillcrest Heights, Hunt Valley, Hyattsville, Hydes, Jessup, Landover Hills, Laurel, Lutherville, Odenton, Oella, Owings Mills, Pikesville, Potomac, Randallstown, Reisterstown, Riverdale, Rockville, Severna Park, Sharpsburg, Silver Spring, Takoma Park, Timonium, Towson, Wheaton
  • Michigan counties: Hillsdale, Washtenaw
  • Michigan places: Ann Arbor, Canton, Quincy
  • North Carolina counties: Cherokee, Surry, Wilkes
  • North Carolina places: Morganton, Murphy
  • New Jersey counties: Burlington, Hunterdon, Mercer, Salem
  • New Jersey places: Browns Mills, Harmony, Hillsborough, Holland Township, Kingwood Township, Merrill Creek Reservoir, Milford, Monmouth Junction, Morristown, Pennington, Princeton, Sourland Mountain
  • New York counties: Suffolk
  • New York places: Stony Brook, LI
  • Ohio counties: Defiance, Franklin, Greene, Hamilton, Logan, Montgomery
  • Ohio places: Anderson Twp, Battelle Darby Park, Bellbrook, Cincinnati, Columbus, Defiance, Delaware, Delhi Twp, Dublin, Fairfield, Galloway, Hamilton, Kettering, Lewisburg, Lockland, Miamisburg, Olmsted Falls, Oxford, Springfield, St. Bernard, West Carrollton, West Chester
  • Pennsylvania counties: Adams, Bedford, Berks, Bucks, Chester, Columbia, County, Cumberland, Dauphin, Franklin, Fulton, Huntingdon, Lancaster, Lehigh, Luzerne, Lycoming, Mercer, Montgomery, Northampton, Perry, Schuylkill, Somerset, York
  • Pennsylvania places:Archbald, Artemas, Bedford, Carroll Valley, Coopersburg, Dinosaur Rock, Downingtown, Gettysburg, Green Lane, Kintnersville, Lake Nockamixon, Lancaster, Lititz, Malvern, Mertztown, Mohnton, Mt Gretna, Oaks, Oley, Perkiomenville, Phoenixville, Pittston, Quakertown, Red Lion, Roaring Spring, Solebury, Spring Mount, Stewartstown, Topton, Upper Black Eddy, Warwick Park
  • Tennessee counties: Blount, Greene, Hamblen, Jefferson, Knox, Roane, Sumner, Wilson
  • Tennessee places: Copperhill, Farragut, Fayetteville, Knoxville, Oak Ridge.
  • Virginia counties: Arlington, Clarke, County, Dulles Smithsonian National Aircraft and Space Museum, Fairfax, Fauquier, Frederick, Shenandoah, Warren, Winchester
  • Virginia places: Alexandria, Annandale, Arlington, Ashburn, Centreville, Chantilly, Clearbrook, Doswell, Dunn Loring, Fairfax, Falls Church, Franconia, Haymarket, Herndon, Lorton, Lovettsville, Manassas, Oakton, Reston, Springfield, Vienna, White Post, Winchester.
  • West Virginia counties: Berkeley, Grant, Hampshire, Hardy, Jefferson, Mineral, Morgan
  • West Virginia places: Martinsburg, New Creek
  • Washington D.C.

More Location Tips:

Why: Why do they stay underground for 17-years? The prevailing research suggests they’ve evolved a long, 17-year lifecycle to avoid predators that can sync up with their lifecycle & emergence. Why are there so many?! Research suggests that their huge numbers allow them to overwhelm predators, so enough of them will live on to breed and perpetuate the brood.

More facts and fun:

1907 Map from Marlatt, C.L.. 1907. The periodical cicada. Washington, D.C.: U.S. Dept. of Agriculture, Bureau of Entomology.

See a modern map, or the Live Map from the Cicada Safari app.
Marlatt 1907 10 Brood X

March 28, 2020

Brood X Stragglers from 2017 in Princeton

Photos of Brood X stragglers in Princeton, New Jersey, from back in 2017. The rest of the brood will emerge in 2021.

Magicicada cassini with mosaic pigment mutation:
Magicicada cassini with mosaic pigment mutation in Princeton 2017

Magicicada cassini with mosaic pigment mutation:
Magicicada cassini with mosaic pigment mutation in Princeton 2017

Female M. cassini. Notice the all-black abdomen:
Female M. cassini Princeton NJ 2017

Cicada skins and Albert Einstein:

Close up!
Close up Magicicada

Magicicada cassini:
Magicicada cassini; Brood X straggler

March 26, 2020

Roy Troutman’s 1980s Cicada Photos, part 3

Filed under: Brood X,Magicicada,Photos & Illustrations,Roy Troutman — Dan @ 4:59 pm

Roy Troutman’s 1980s Cicada Photos, part 3.

Skip to Part 1 and Part 2.

1987. Cicada on small branch.
Roy 1987 Cicada on Small Branch

1988. Straggler cicada molting.
Roy 1988 Straggler Cicada Molting

1987. Cicada on thistle.
Roy 1987 Cicada on Thistle

1988. Tibicen exuvia race.
Roy 1988 Tibicen Exuvia Race

1988. Two cicadas in silhouette.
Roy 1988 2 Cicadas in Silhouette

Roy Troutman’s 1980s Cicada Photos, part 2

Filed under: Brood X,Magicicada,Photos & Illustrations,Roy Troutman — Dan @ 4:52 pm

Roy Troutman’s 1980s Cicada Photos, part 2.

Skip to Part 1 and Part 3.

1987. Mating Cicadas.
Roy 1987 Mating Cicadas

1987. Cicada chimney.
Roy 1987 Cicada Chimney

1988. Straggler cicada.
Roy 1988 Straggler Cicada

1987. Cicada feeding.
Roy 1987 Cicada Feeding

1988. Roy & Pa watching emerging cicadas.
Roy 1988 Roy & Pa Watching Emerging Cicadas

Roy Troutman’s 1980s Cicada Photos, part 1

Filed under: Brood X,Magicicada,Photos & Illustrations,Roy Troutman — Dan @ 4:45 pm

Roy Troutman’s 1980s Cicada Photos, part 1.

Skip to Part 2 and Part 3.

1987. Cicada on finger.
Roy 1987 Cicada on Finger

1987. Nymph exit holes.
Roy 1987 Nymph Exit Holes

1987. Cicada next to shell (exuvia).
Roy 1987 Cicada Next to Shell

1988. Shells with spider.
Roy 1988 to Shells With Spider

Tom & Roy watching cicada molt.
Roy 1988 Tom & Roy Watching Cicada Molt

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