National Geographic : 1950 May
© National Geographic Society 648 Kodachrome by Paul A. Zahl Conservative White and Snappy Scarlet Are Close Relatives and Next-door Neighbors Bone for bone, these two are identical. Some ornithologists consider rubra and alba color varieties of the same species. The author looked for mixed marriages, but white to white, scarlet to scarlet seemed to be the rule. r. - ' . *,.