Thanks Russ and JL1.
I just finished reading the information in the links from both sources. The crayfish in my pond are making a big mess burrowing into the clay banks. According to what I just read, most rusty crayfish don't burrow. Also, I am in south central PA, which seems to be a less likely area. So mayby I'm OK.
I am going to catch a few when I get a chance and look for the rust spots. I will also try to identify them by their claws(according to the info in the links).
I did not introduce these into my pond. Apparently the species I have are native to the area. But I sure do have a lot of them and big ones too.
