The notes are occasionally poured forth in the air as the bird flits from tree to tree. But very commonly it is heard, without any variation, from the male and female alternately, seated on two trees, perhaps on the opposite sides of a road; thus:—The Mountain Dick calls, and the Judy immediately answers; then a little pause;—another call from the Mountain Dick, and an instant answer from Judy;—until, after a few successions, the Judy gallantly yields the point, and flies over to the other tree to join his friend. In February, I have heard it repeating a note somewhat like _che-w_. This species is bold and fierce in self-defence, the female no less than the male. On several occasions, when I have shot, and but slightly wounded, one, it would make vigorous efforts to escape by running; but on being taken in the hand and held by the legs, it would elevate the crown feathers, turn the head up and bite fiercely at my fingers, seizing and pinching the flesh with all its force; striving at the same time to clutch with its claws, and screaming vociferously. I have never seen it pursue other birds in the aggressive manner of the true Tyrants; nor, as far as I am aware, does it capture insects in the air, notwithstanding that the rictus is defended by stiff bristles. Stationary insects are usually the contents of the stomach, particularly large bugs, (_Pentatoma_) and caterpillars, and sometimes the eggs of insects. In the winter the berries of the _Bursera_ or Tropic Birch, constitute a large portion of its food.