animal beware caution danger epidemic flu H1N1 hazard health icon illustration influenza pandemic pig safety sign silhouette swine symbol virus adorable bathing characterisations characterizations collection collector’s-item cultural culture cute decorative display displayed distinctive health-hazard iconic loved novelties novelty pop-culture popular rubber rubber-duckies rubber-ducky symbolic toy toys vinyl-plastic yellow atmosphere barrier breaking-through bright burn-off bushfire changing color colour contrast dark darkening daylight discoloration fiery filtered fire fires halo hazardous Haze hazy light low-visibility skies sky smoke smokey smoky sunlight sunshine trees unhealthy visibility afterglow amber circle circular cloud heat red access-denied advice alert appropriate-behavior appropriate-behaviour asbestos avoid black care communicating communication concern damage dangerous demolition denied destruction directions fence fencing health-risks keep-out mesh message no-access no-entry not-allowed not-permitted permission-denied prohibited prohibition requirements restrictions risk risks risky unwanted warning warning-sign white