My home town has Catalpa trees scattered all over it. But you never see any worms, i think they sprayed them. I do know of a few that has them out side of town, but they don't produce them every year. When they do i gather as many as i can find and freeze them. You ain't gonna believe me, but i've taken some out that had been in there for a couple weeks. Got to the river and opened the lid and a few were crawling around. Best bait there is in my opinion for just about any kind of fishin, especially the cats. One of the worst fights me and the wife ever had was over her throwing my worms out hehe...izzy