Generally, Gyrfalcons are silent, especially when hunting. Their calls are typically harsh, squawking notes, like "kree-kree-kree" or "kek-kek-kek," primarily used during nesting or territorial disputes. They are most active during daylight hours, particularly at dawn and dusk. They are powerful, direct flyers with deep, strong wingbeats, often flying low to the ground or soaring high above.