My lack of knowledge about crawdads exceeds what I do know. However, that has never stopped me, so:
I have seen them in lakes high in the Rocky Mountains and in down South swamps, creeks and everywhere in between.
Walk the edges of your pond. Everyone that I have seen digs burrows except for those in the high rocky areas. Not sure what they do. Look for holes from the waters edge to 10 ft. from the edge. They burrow down to the water level. If the burrow gets too tight or gets dirt in it, they will push the offending dirt to the top and leave hills around the hole.
Lots of species. I have trapped them in a minnow trap as Sunil recommends trying. Any thing is good bait. They taste great and fish love them. For that reason, they are tough to keep going in a mature pond.
