How Peregrines Communicate Peregrine falcons make various noises for different reasons. One common sound is the "ee-chup." They make this sound when they are communicating with another peregrine. Peregrines often use a softer "ee-chup" with their mate, whereas they often make a louder, more alarming sound for a new peregrine, sometimes an intruder. You can listen in on these falcon conversations by watching one of our five 24/7 live stream cameras: https://www.ab-conservation.com/wildlife-camera