Since acquiring her doctorate at Massey University, Dr Isabel Castro has closely studied New Zealand's native birds, with particular focus on hihi and kiwi. Among other published works, Isabel is co-author of A Guide to the Birds of the Galapagos Islands (Christopher Helm, 1996). She lives in Palmerston North. Rod Morris is one of New Zealand's foremost natural history filmmakers and photographers. His collaborations with New Holland include New Zealand Nature, A Photographic Guide to Reptiles and Amphibians of New Zealand, and A Photographic Guide to Mammals of New Zealand. Rod lives on the Otago Peninsula.