An interesting ritual recognition of birds of its kind: with the head slightly lowered and the long feathers on the nape of fluff, like a rooster ready to fight. bright "helmet" most clearly visible against the rearing pens. At this time the bird finely shakes his head and emits a sound similar to the buzz.
This species differs aggressiveness in relation to related species: birds alone can attack the enemy even surpassing it in half by weight.
Voice of birds of this species - staccato whistle, published in series of 5 - 6 signals with a small pause.