Trevor H Worthy is a research associate at the Museum of New Zealand Te Papa Tongarewa (Birds Department), Wellington, and is an independent researcher contracted to the Foundation for Research, Science and Technology (New Zealand Government). He has published extensively, with emphases on taxonomy (variously addressing moa, other Birds, frogs, lizards, and bats) and paleofaunal reconstruction in New Zealand and the Pacific.
Richard N. Holdaway is an extinction biologist specializing in the effects of human settlement and introduced mammals on pristine faunas. He is an independent researcher contracted to the Foundation for Research, Science and Technology (New Zealand Government), and an Adjunct Senior Fellow in the Department of Zoology, University of Canterbury. He has published on the systematics of hawks and eagles, the paleobiology of New Zealand Birds, and Quaternary extinctions.