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Identifying Idaho Cicadas

Identifying Idaho Cicadas
Mountain Home, Ada County, Idaho, USA
June 6, 2014
Size: 28mm
The photo was taken on the SF Boise river, near mountain home Idaho, in early June of 2014. This river gets a yearly smaller cicada (on the left) but in 2014 it had a larger cicada that hatched (on the right). The scale in the photos is a "Bugometer" and is used to size bugs for choosing a fly-size. The smaller cicada is a hook-size 6 2XL, which would make the body around 20mm long. The larger cicada's body is about 28mm long. I am trying to identify the larger cicada to figure out it's emergency cycle. My best guess is it is a "Okanagana rimosa rimosa"or "Okanagana bella". I would also be interested in information about the smaller cicada.

Images of this individual: tag all
Identifying Idaho Cicadas Identifying Idaho Cicadas Identifying Idaho Cicadas

Moved from Cicadas.

You have a Platypedia sp. on
You have a Platypedia sp. on the left and an Okanagana sp. on the right. Neither are identifiable to species from these images. While there aren't a lot of choices in Idaho you'd need dorsal and side photos to have a shot of identifying the Okanagana (it is almost certainly not rimosa, it would likely end up being occidentalis). The Platypedia is in the same subfamily but without the specimen in-hand, probably impossible to ID even with really good photos.

As for the emergence cycle: Okanagana emerge on a protoperiodical schedule. This means that most species have a lifecycle between 2-5 years and that when they emerge it is in varying densities. O. rimosa though has an approximately 8-year lifecycle, so it's a little bit of an outlier. The short version is you can't predict when they emerge or how many will come out. A very small group of species' emergence time can be roughly predicted, but those are restricted to California.

Please add dorsal view if you have one
Just an underside view is not likely to get a specific ID

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