Category: Life Cycle

Cicadas have three types of life cycles: annual, periodical, proto-periodical.

Brood X Magicicada photos by Jim Occi taken in Princeton, set 6

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Post date July 7, 2021
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Brood X Magicicada photos by Jim Occi taken in Princeton, set 6. 2021.

Teneral Magicicada:

Magicicada septendecim that failed to completely exit its exuvia before its body hardened:
Magicicada Jim Occi

A pair of Magicicada septendecim:
A pair of Magicicada Jim Occi

Brood X Magicicada photos by Jim Occi taken in Princeton, set 5

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Post date July 7, 2021
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Brood X Magicicada photos by Jim Occi taken in Princeton, set 5. 2021.

Molting Magicicada:

Teneral Magicicada:

Teneral Magicicada expanding wings:

Adult Magicicada with crumpled wings:

Brood X Magicicada photos by Jim Occi taken in Princeton, set 4

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Post date July 7, 2021
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Brood X Magicicada photos by Jim Occi taken in Princeton, set 4. 2021.

A Rutgers cap in Princeton (one day Rutgers needs to get that cannon back).

Magicicada septendecim with exposed tymbal:

A Magicicada with its abdomen wrecked by Massospora fungus.
Magicicada wrecked by Massospora

Magicicada exit holes:
Magicicada holes by Jim Occi

A pair of Magicicada septendecim:

Brood X Magicicada photos by Jim Occi taken in Princeton, set 3

Post author By Dan
Post date July 7, 2021
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Brood X Magicicada photos by Jim Occi taken in Princeton, set 3. 2021.

Magicicada septendecim on finger:
Perched on finger

Teneral, newly molted Magicicada:
Teneral Magicicada

Magicicada septendecim perched on a plant stalk:
Magicicada on plant Jim Occi

A mass of Magicicada skins:
A mass of exuvia by Jim Occi

Magicicada septendecim on a leaf:
Magicicada on leaf

Magicicada cassinii photos from Brood X

Post author By Dan
Post date July 3, 2021
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Here are some Magicicada cassinii photos from Brood X, 2021, Flemmington, New Jersey.

Magicicada cassinii ovipositing
Magicicada cassini ovipositing

M. cassinii taking a drink:
Taking a Drink Cassini

Tags M. cassini, M. cassinii

Flagging Magicicada Ovipositing Periodical

Examples of flagging from Brood X in Princeton

Post author By Dan
Post date July 3, 2021
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When Magicicada cicadas deposit eggs into a tree branch sometimes the branch dies, the leaves turn brown, and the branch droops like a flag. This is called flagging.

Here are some examples of flagging from the Brood X emergence in Princeton, NJ.

Typically flagging is more impactful to trees imported to North America, but it also impacts native species. The positive aspect is it prunes weaker branches, which helps the tree, and helps other plants in the shade of the tree.

If you want to learn whether eggs/larva survive flagging read FLAGGING: HOSTS DEFENCES VERSUS OVIPOSITION STRATEGIES IN PERIODICAL CICADAS (MAGICICADA SPP., CICADIDAE, HOMOPTERA) by JoAnn White. Hint: very few survive.

A small tree with flagging:
A small oak with flagging

Flagging up close:

Another small tree with flagging:

Brood X Magicicada Periodical

Brood X Magicicada Photos from Princeton

Post author By Dan
Post date July 3, 2021
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These are a set of Brood X Magicicada photos from Princeton, nearby a Burger King, an area with a large population of Magicicada septendecula. Taken in 2021 by Dan Mozgai.

Left to right: Magicicada cassini, Magicicada septendecula, Magicicada septendecim:

Magicicada septendecim with a black wing margin:

A pair of Magicicada septedecim:

Magicicada septendecim:

Tags M. cassini, M. septendecim, M. septendecula

Jin Yoshimura Magicicada Periodical

The Evolutionary Origin of Periodical Cicadas: A Sci-Fi Story by Jin Yoshimura

Post author By Dan
Post date June 27, 2021
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Here’s a video from Jin Yoshimura who researches periodical cicadas.

The Evolutionary Origin of Periodical Cicadas: A Sci-Fi Story:

The Evolutionary Origin of Periodical Cicadas: A Sci-Fi Story:
Periodical cicadas are known for their unique 17- and 13-year life cycles and mass emergence events. This mystery of why they would have evolved these two prime-numbered life cycles has attracted many biologists and mathematicians. Dr. Yoshimura will explore this phenomenon

Platypedia Platypediini Proto-periodical Tim McNary

Platypedia putnami survey at Horsetooth Mountain Open Space by Tim McNary

Post author By Dan
Post date June 8, 2021
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Here’s a short 2021 update for the Platypedia putnami survey at Horsetooth Mountain Open Space, west of Fort Collins, Colorado. 2021 is turning out to be a very large emergence for this cicada, and it’s not through yet! The survey transect goes from the trailhead parking lot to Horsetooth Falls. Although the first exuvia found was on May 22, 2021, the bulk of the exuvia, so far, have emerged (153 of 201 exuvia) June 5-8th. “Clicking” of adults can be heard in many areas, but is concentrated in certain sites.

Tim McNary
Fort Collins, CO

Here are the mega data on exuvia found each year:
2009- 136 exuvia
2010- 0
2011- 3
2012- 2
2013- 179
2014- 0
2015- 12
2016- 0
2017- 0
2018- 13
2019- 2
2020- 0
2021- 201 (exuvia through June 8, 2021)

Links:

Brood X Chimneys Magicicada Periodical

Different types of Magicicada periodical cicada holes

Post author By Dan
Post date May 2, 2021
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Different types of Magicicada periodical cicada holes found in Princeton, NJ. Brood X, 2021. Generally speaking, their holes are about the size of a dime. You won’t see a spray or kickback of soil around the hole like you would when an animal is digging into the soil rather than coming out of it (cicadas are coming out).

Typical dime-sized cicada holes

Typical Holes

A hole with a corresponding mini cicada-chimney

Here's a hole and cap

A golf ball sized chimney over a hole

Mud Golf Ball

A hole borrowed into a hay bale laying on the ground

Hole in Hay

A hole in moss

Holes in the underside of a rotten log, with a nymph!

Cicadas will burrow up from the soil of the ground and keep going into the rotting wood of a rotten log! I had to roll the log over to see it.
Holes in a Log

The inside view of a 4″ cicada chimney

Chimey