Keywords: CBBM25 192.png Larus franklini <small>Swains </small> Leucophaeus pipixcan <small> Wagler 1831 </small> ad Franklin's Gull adult wingtip pattern from below Catalogue of the birds in the British Museum http //www archive org/details/catalogueofbirds25brit Vol 25 Page 192 1896 Howard Saunders Osbert Salvin text PD-old CBBM25 Leucophaeus pipixcan Laridae feathers |