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Outside my experience: possible Rusty Crayfish (Orconectes rusticus), literally 1000's of them on the beach during a very windy day with large waves, Lake Simcoe, McRae Point Provincial Park, Orillia, ON, Aug 5/17

With the downward pressure of my boot, I was able to propel the crayfish out of its semi-flooded chimney.

Note (2022-02-16): The most significant threat to this occurrence would be European Common Reed (Phragmites australis ssp. australis). A stand exists within ~15 m to this observation.

If this occurrence is situated within suitable habitat, there is a myriad of suitable habitat locally for this taxon.

This was an incidental observation. This taxon was not known to exist in this area until this observation was confirmed.