Duncan Usher / Painted Lady (Vanessa cardui) butterfly feeding on Blackeyed Susan (Rudbeckia hirta) flower nectar, Lower Saxony, Germany

Adrian Davies / Black-Eyed Susan (Rudbeckia hirta) flower, Sanibel Island, Florida, USA

Ingo Bartussek / Black eyed susan {Rudbeckia hirta} in full bloom and with withered flowers, Germany

Niall Benvie / Black eyed susan {Rudbeckia hirta} leaves and flower, USA

Larry Michael / Black eyed susan {Rudbeckia hirta} flowers, USA

Tim Fitzharris / Blackeyed Susan (Rudbeckia hirta) pair blooming, North America

Adrian Davies / Black-eyed susan (Rudbeckia hirta) illuminated using different waveforms of light. Visible light (left), reflected UV light (centre), UV light as seen by bees (right). Studio environment, composite.

Adrian Davies / Black eyed susan (Rudbeckia hirta) cultivated form, in flower.

Adrian Davies / Black eyed susan (Rudbeckia hirta) cultivated form, in flower, reflected ultraviolet light.

Steve Gettle / Blackeyed Susan (Rudbeckia hirta) flower reflected in water droplets, Brighton Recreation Area, Michigan