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 advice animal-crossing animal-priority announcement appropriate-behavior appropriate-behaviour be-careful careful cautious communicating communication directions distance informing lookout mammal not=too-close observant observe otter otters restricted restriction restrictions safety security watch watch-out bicycle bike cycle horse horses light lights London rider traffic traffic lights african dog painted dog watch out wild wild dog zoo