Hi Ken!! I just don't know about that "bird." :-) I was not aware that perch used the coastal rivers like that! Not surprised, of course, giving that we always say "never say never." :-)
I went back and looked, and we actually had four population samples from Georgia. I think all were reservoirs, but not 100% sure. The four were: Lake Burton, Lake Rabun, Lake Seed, and Lake Tugaloo.