The S-curve on a Great Blue Heron charts this bird’s success as a hunter. That long neck creates an S-curve as the GBH waits and watches for prey, usually as it wades in shallow water. When it spots prey, that curve straightens in a nano-second as it reaches out to snatch its unsuspecting victim. After devouring its meal, the GBH once again settles back into the S-curve as it waits and watches for the next bite.