 In 1974, when Dawn took up a four-year appointment as a senior biologist and advisor at Phuket Marine Biological Center in southern Thailand, Clifford studied aspects of invertebrate and vertebrate zoology while working as a freelance zoological photographer, artist, author and advisor.They married at Bangkok Central Police Station, in October 1975.In December 1977, they moved to tropical north Queensland, Australia, to start decades of field studies of bowerbirds and birds of paradise and other rainforest-dwelling bird species in tropical eastern Australia and in the Papua New Guinea highlands.