Grandma was kind of right. Even my caterpillar book talked about how Catalpa caterpillars used to be sold as fish bait which I thought was kind of neat (in it's own way). Bad for the caterpillars but I am a Florida girl and have caught my own dinner many times. We always used shrimp or fake lures, though. But I did have to explain to Grandma the difference between worms and caterpillars.