butterfly clouded Colias feed flower grass head insect Lepidoptera rest Sardinia scabious wing yellow England english fence field flora flowers Great Britain hillside mauve meadow nature plant Scabiosa South Downs summer Sussex wild wire wooden bee bumblebee collect collecting pollen furry fuzzy hairy Hymenoptera pollinate wings abundance abundant color colour diversity ecology Greece Greek Leguminosae many natural plants profusion purple spring animal antennae beauty Chalkhill Blue delicate feeding green haustellum Lycaenidae proboscis rhopalocera veins anthers biennial blue florets lanceolate leaves linear lobes narrow oblong petals rosette saavem stiffly stigmas violet