achtung caution caution watch your s communicate communication cuidado danger peligro sign signage signs step texture textures warn warning watch your advice alert appropriate-behavior appropriate-behaviour be-careful beware care careful communicating concern conditions dangerous directions garden garden-beds informing keep-out lookout not-allowed not-permitted planter-beds prohibited prohibition red risk risks warning-sign watch-your-step Back switch concert gray light house silver staircase tower aggressive birds black brown colorful colourful common hungry Indian introduced species mature mother myna birds Noisy roadside street watchful yellow young ba1969 gap Look mind post