animal antenna Arthropoda british butterfly compound eye dainty delicate England eye fragile hindwing insect Insecta leg Lepidoptera Leptidea sinapis nature perch Pieridae rare rest rhopalocera scale scales scarce sit small Surrey tiny underside vein venation wing wood white allocasuarina allocasuarina-decaisneana angiosperm arid Australian-pine branchlets Casuarina conifer-like desert-country desert-oak desert-region distinctive dry evergreen feathery-foliage foliage green hardy hot inland leaf leaves medium-sized tree native she-oak sheoak textures tiny-scales tree trees vegetation whorls