advice alert appropriate-behavior appropriate-behaviour behave behavior behaviour birds black care careful caution communicate communication directions ducks fatal feed feeding food inform information informing message no-bread not-allowed not-permitted permission-denied prohibited prohibition red restricted restriction restrictions sign signage warning water-birds watrer-fowl white be-careful beware concern danger dangerous large-vehicles limitations limited lookout observant reversal reversing risk risks risky safety signs trucks vehicles warning-sign watch watch-out denied dumping illegal no-dumping no-verge-dumping roadside secretive verge access-denied access-limited entry-denied entry-prohibited keep-off limited-access no-access no-entry prosecution trespass trespassing unauthorised unauthorized boating boats communicating directing direction helpful informative rocks rocky shallow symbol symbols water waterside words yellow blue brown damaged rough scratches scrathed advising allocated allocation arrow authorised authorized automobiles directive emergency emergency-vehicles