Whatever species are present in your area will show up in your waters. Start there.
Although that is often true in flat lands, we will be building these ponds fairly high up and away from (as well as separated by ridges from) other BOWs, so I doubt any local ones will make it into the pond.
There are a lot of species of crawfish in the mountains of North Carolina, but their behavior is not well-documented, and I would doubt I could identify them well enough even if we did know which ones were desirable for a pond.
