admiral Buddleja butterfly eat flower purple shallow DOF suck sucking summer eating Pieris brassicae sitting nectar proboscis Vanessa atalanta antenna Argynnis Argynnis paphia England feed feeding fritillary haustellum insect Lepidoptera nature rest resting rhopalocera silver-washed fritillary Sussex thistle wing animal Centaurea flowerhead knapweed skipper small small skipper Thymelicus tiny tongue wild baby child dummy eye face infant pacify sooth soother bee close closeup drinking macro marguerite white bottle drink fluid green hydrate hydration isolated refresh sip straw thirst thirsty water open red blue rgb