W. Mary McEwen: The Food of the New Zealand Pigeon (Hemiphaga novaesellandia novaeseelandia). In: New Zealand Journal of Ecology. Bd. 1, 1978, ISSN0110-6465, S. 99–108, (PDF; 266 kB).
W. Mary McEwen: The Food of the New Zealand Pigeon (Hemiphaga novaesellandia novaeseelandia). In: New Zealand Journal of Ecology. Bd. 1, 1978, ISSN0110-6465, S. 99–108, (PDF; 266 kB).