Printed on reverse of postcard: "Kaka Beak, Kowhai ngutu kaka (Clianthus puniceus), Pea family. A decorative shurb, once wild on cliffs near Auckland: endemic."
Auckland War Memorial Museum, Red Kowhai (Clianthus puniceus) (Unknown). University of Waikato, accessed 20/02/2025, https://onehera.waikato.ac.nz/nodes/view/11105