Hummingbirds usually call to mind tranquil water baths, graceful fluttering wings, and long beaks drinking from nectar-filled flowers. But there’s another side to this serene-seeming bird that defies expectation. SoCal-based photographer Terry Williams knows that hummingbirds can be “very territorial”—and he recently captured some extraordinary shots of the birds dueling. In recent years, Williams has been shooting these beautiful birds that come to visit the hummingbird feeders in his backyard; each day some 20 different hummingbirds flock there to wet their beaks. But sometimes, the retired immunologist said, he would spot a commotion in the crowd. “Some of the hummingbirds, especially the males, become what a lot of people refer to as a ‘bully,’ very aggressive,” Williams told The Epoch Times. “This is just part of their nature. “Occasionally, a bully will come in and try to take over a feeder or a group of feeders. “And this bully is …