black and yellow striped butterfly on purple flower

black bloom blooms blossom blossoms botany butterflies butterfly city environment europe european flower flowering flowers france french garden gardening gathering green harmony horticulture insect insects iphiclides known lepidoptera lepidopterist natural nature nectar nectaring observe outdoor outdoors peartree perch plant plants podalirius pollination pollinator pollinators purple rest resting sail scarce southern striped stripes summer swallowtail travel urban violet watching wildlife winged wings yellow