"Croassement" of one, "cornage" on the other crows did not hesitate to play their votes. "Kroa kroa" course and "Ou-ainn". Scraping throat, pinching the nose up to issue an "clouclouclou" dovecote.
The tube in hand, hold the bird call between thumb and index blast (beside therefore split) allowing the sound to die. Vary the value of her by the hand, by opening the fingers. Repeat three or four times.
"Ouain." Or. "Ain. Or. Ain."