Force of Nature Te Aumangea o te Turoa, written by David Young and Naomi Arnold, is the inspiring history of New Zealand's oldest independent conservation organisation. Forest & Bird. It has been at the forefront of environmental protection for over 100 years, and to mark their centenary in 2023 this book was commissioned to document their remarkable history. Beginning in 1923, Forest & Bird have been involved in all of the significant environmental campaigns of the last century, starting with efforts to protect native birds and their forest habitat.