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February 5, 2015

Visualizing all periodical cicada broods

Isn’t this a lovely picture (updated with colors sorted)?

All Broods

This image represents the combined range of all Magicicada periodical cicada broods, including the extinct Broods XI (last recorded in Connecticut) and XXI (last recorded in Florida).

To produce this image, I visited John Cooley’s Magicicada.org Cicada Geospacial Data Clearinghouse and downloaded the Shapefile of Magicicada broods. Then I used the computer program QGIS to change the Shapefile to a KML file, and then I opened the file in Google Earth. Credit goes to John for pulling the data together into the Shapefile.

I manually edited the KML file to try to give each Brood a different color.

An interesting area is Fredrick County, where 5 different broods seem to exist (or have existed) at once.
Fredrick County VA

Peach = Brood I
Green = Brood II
Purple = Brood V
Cyan = Brood X
Red = Brood XIV

It’s also interesting that four of the broods are separated by four years: X, XIV, I, V.

November 20, 2014

Magicicada cassini singing on hand

Filed under: Brood XIV,Magicicada,Roy Troutman,Sounds,Video — Tags: — Dan @ 8:48 am

From Roy Troutman: “I shot a video back in 1991 of a 17 year Magicicada cassini singing right on my hand.”

Magicicada cassini singing on hand from Roy Troutman.

November 19, 2014

Magicicada cassini calls, chorusing & responses to finger snaps

Filed under: Brood II,Magicicada,Periodical,Sounds,Video — Tags: — Dan @ 8:00 am

During the Brood II emergence in 2013, Elias Bonaros, Roy Troutman and I spent some time experimenting with coercing male Magicicada to call in response to finger snaps, which mimic the snap of a female cicada’s wings. This trick works fairly well with Magicicada, and can quickly be mastered once you work out the timing. Fingers, wall switches, and the zoom button on my Sony video camera do a good job at mimicking the snap of a females wings.

Magicicada cassini responding to fingersnaps

Magicicada cassini responding to fingersnaps.

I also recorded their calls in terms of decibels to see just how loud they could get. They can get very loud, but not as loud as a rock concert (see this db chart).

Magicicada cassini calling at 109db in Colonia NJ

Magicicada cassini calling at 109db in Colonia NJ.

Magicicada cassini chorusing center peaking at 85db

Magicicada cassini chorusing center peaking at 85db.

December 22, 2013

M. cassini in Connecticut

Filed under: Brood II,Magicicada,Periodical — Tags: — Dan @ 5:53 pm

A news story came out in November reporting that M. cassini appeared in areas of Connecticut where they were not expected during the Brood II emergence this year. This must have been a 2013 highlight for cicada researchers in the Connecticut area.

June 23, 2013

New York is still loaded with cicadas

Filed under: Brood II,Magicicada,Periodical,Video — Tags: , — Dan @ 7:51 pm

New york cicadas If you want to see and hear the Brood II cicadas, play hookey this week, and head on up the Hudson Valley in New York State. DO IT! It’s your last chance until 2030 (unless you want to see Brood III and XXII next year).

Today I took an eight hour road trip along the Hudson River in NY. I hit Palisades Interstate Park, Bear Mountain, Cold Springs, virtually every town along rte 9G and 199, Germantown, Hudson, and Woodstock.

Cold Spring and Woodstock were a little disappointing, though their downtowns seemed like nice places to visit (no time for human fun when you’re tracking cicadas). The east side of the Hudson River was definitely more active than the west side, although I did hear cicada choruses along Interstate 87 between exit 18 and 16.

Here’s my favorite locations. The first one is pure gold.

Rt 199
A rest stop for cars.
Rhinebeck NY 12572
41.972693,-73.915277
Loads of ‘decims and cassini. Cassini could be picked off the low lying trees like grapes. ‘Decims hugged trees by the 100’s. Best spot of the day.

130 Main street by the river.
Germantown, NY 12526
42.134975,-73.897069
Cassini and decim choruses. Decims and cassini on low vegetation.

400 New York 308
Rhinebeck, NY 12572
41.938882,-73.88215
Cassini and decim choruses. Decims in low lying trees.

Dutchess Mall, ironically near a big box hardware store that will remain nameless
Fishkill, NY
41.515125,-73.892328
Cassini and ‘decim choruses. ‘Decims in low lying trees. Very active and feisty.

Tiorati Brook Rd
Stony Point, NY 10980
41.252589,-74.055829
‘Decim choruses. ‘Decims in low lying trees.


Some video and audio from the New York emergence:

Periodical cicadas at a rest stop in Rhinebeck NY:

Magicicada septendecim in Stony Point NY:

Magicicada cassini Court II and III NY Brood II 2013:

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