Wildlife and Snakes
Because airsoft games are most often played in natural surroundings, animals can often interfere with these games and potentially be hazardous. In the Southwestern United States snakes offer one of the most significant threat especially the potentially deadly Diamondback rattlesnake.
Many games in California institute a "snake call", whereby players have to yell "snake" when one is encountered to mark the location and warn other players. After a snake has been identified, that section of the field may be marked as out-of-bounds, or the game may be delayed until the threat is dealt with.