species of the week: Xanthoria parietina


an uncommonly beautiful example of common orange lichen aka Xanthoria parietina, maritime sunburst lichen or shore lichen. it thrives in sunny hardwood forests and on exposed seacliffs, where bird droppings provide a rich source of nitrogen. incredibly tolerant of air pollution and heavy metal contamination, it can be used as a bioindicator to measure things like air quality