What is a common signal used for warning other hunters?

Using a whistle or shouting "STOP" is a commonly recognized signal among hunters to warn others of potential danger. This method is effective because it is both loud and clear, making it easy for those nearby to hear, even over the sounds of nature or other activities. Sound signals are beneficial in alerting other hunters to halt their actions, which can help prevent accidents or misidentifications of targets.

On the other hand, firing a shot in the air is not advisable as a warning signal because it can be misconstrued as a sign of shooting an animal, potentially leading to confusion or increased risk of accidents. Waving hands in the air could be seen as a general gesture, but it may not attract attention effectively in a loud environment. Flashing a flashlight can be useful in low-light conditions, but does not provide an immediate auditory cue, which can be more urgent for communication among hunters in the field.