alert animal animals awareness be careful beware birds black bright care caution chickens chicks crossing crossing- alert danger ducklings ducks protection road crossing sign warning watchout water birds water fowl wildlife yellow blue sky african dog lookout mammal observant observe painted dog watch watch out wild wild dog zoo advice animal-crossing animal-priority announcement appropriate-behavior appropriate-behaviour be-careful careful cautious communicating communication directions distance informing not=too-close otter otters restricted restriction restrictions safety security watch-out cars concern dangerous listen Look looking rails railway railway-crossing red risk risks road signs trains warning-sign white information pedestrians risky road-sign speed-reduction stop street-sign traffic traffic-flow walk walkers walking share sharing aged aging elderly old seniors signage slow symbol double-lines island reflective refuge small-traffic-island traffic-island