butterfly flower fritillary garden Great Spangled Fritillary orange speyeria cybele yellow antenna Argynnis Argynnis paphia England feed feeding haustellum insect Lepidoptera nature proboscis rest resting rhopalocera silver-washed fritillary suck sucking summer Sussex thistle wing animal Argynnis aglaja dark green Great Britain natural pattern South Downs bright bulb cheerful Fritillaria imperialis hanging imperial flower Kaiser's Crown pendant regal flower royal flower spring Spring flowers suspended arch beautiful beauty bench bloom daffodil Fritillaria narcissus tree chequered delicate drooping head nodding patterned petal purple red reticulated snake