Apollo butterfly  (Parnassius apollo)

Adult Apollo butterflies are seen on the wing in mid-summer (2), feeding on nectar produced by flowers (8). The females lay eggs, which over-winter and hatch in spring the following year (5) (6). The resulting caterpillars feed on stonecrop (Sedum species) and houseleek (Sempervivum species) (4). When the caterpillar is fully-grown it will pupate on the ground, forming a loose cocoon from which the adult butterfly emerges following metamorphosis (2).