Crappie's are cyclical spawners, they can have numerous spawns in a single season and sometimes not spawn for a while, if I'm not mistaken. But a lot of things are out of whack on earth right now

Louisiana Sportsman

Research indicates, at least with adult crappies, that white crappie are more effective than black crappie at capturing food items in water with poor visibility. Large white crappie are strong fish predators. Black crappie also eat fish, but gut checks during summer months will often show their stomachs — even those of large fish — jammed full of ¼-inch long, almost transparent midges (flying insects that resemble mosquitoes.)

I found this interesting, I've seen some say black crappies eat more bugs