Drum are an odd species. I've always been interested (kinda) in what makes them tick.
They go, for the most part, unseen, until you have a crazy weather pattern or something that just completely shuts down every other fish in the body of water.....and then they miraculously appear as the only thing that will chase and bite. The times when you'd think conditions are great and every other fish species is having a party.... you'll likely not even see a drum, much less catch one.