Elizabeth Nelson's City Council Blog

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I write a City Council newsletter with my summary of agenda items coming before City Council. Sign up to receive it first via email, or read it here later on this blog.
I post charts of how Council voted after each meeting, and also post my perspectives on how issues were resolved. I post news that affects Ward 4 residents tagged with "Ward 4 News", with construction updates also tagged "Construction 2021". News that affects all city residents is tagged with "City News".

City Information on 17 Year Cicada Emergence in May/June 2021

The City forestry department has put together information about the 17-Year Cicada emergence that will happen in May/June of 2021, including information on protecting young small trees.

https://www.a2gov.org/departments/forestry/Pages/17-Year-Cicada-Emergence-.aspx



From the City's website:


Ann Arbor, along with large parts of the midwest and ​eastern ​United States, will experience a 17-year Cicada emergence in May and June of 2021. ​


Cicadas do not bite and are harmless to humans and property — other than being a nuisance. They may amass in vast numbers in parks, wooded areas, neighborhoods and can seemingly be everywhere. When they are this abundant, they fly, land and crawl everywhere, including occasionally landing on humans.


Cicada life history

17-year cicadas are also called periodical cicadas, which is a group that includes 13-year cicadas. Cicada nymphs live underground for 17 years and emerge near the end of their life cycle. At this point, they:​

  • molt on trees, live for several weeks and mate

  • female cicadas lay eggs in small tree branches and trunks

  • adult cicadas die, new cicadas hatch and burrow into the ground for another 17 years

This batch only emerges when soil is 64 degrees at about 8 inches of depth, which in Ann Arbor occurs in late May or early June



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