I live in Australia and when I used to go camping/fishing with my family my grandfather would pullover on the side of the road and butcher a roadkill kangaroo and use it as bait in crayfish traps (we call them yabbies) we would then use them as bait for freshwater fishing in billabongs. There is something about crayfish, they are fun to play with and watch crawl on the ground.
they are good bait for:
>golden perch (yellabelly)
>murry cod