The Apollo

This large white butterfly decorated with black marks and red dots, is common in warm areas where stonecrops and houseleeks grow, as these are host plants for its caterpillars. It remains common in the Alps, but is much rarer elsewhere. In fact, it is a protected species. Its movement to higher altitudes has been observed, in line with climate warming, because its eggs, which it lays on plants in summer, need a certain number of days of freezing temperatures in winter in order to hatch.