For the panfish angler, spring might as well be Christmas. Every year, hordes of crappies flock to the shallows to spawn. In the Northern states, this can occur a month or so after ice-out or even during the last of the hard-water season, and in the South the migration can start as early as February. Regardless of when it begins, anglers have a big window in which to target this huge concentration of fish and the ensuing prespawn feeding frenzy. Here’s what you need to know.