L. E. Richdale

• A population study of penguins
• A study of a group of penguins of known age
• Allied perching birds in New Zealand
• Biology of the sooty shearwater Puffinus griseus
• Camera studies of New Zealand birds
• Maori and mutton-bird
• Native perching birds of New Zealand
• Pair-formation in penguins
• Photographs of the royal albatross
• Post-egg period in albatrosses
• Sexual behavior in penguins
• The pre-egg stage in Buller's mollymawk