Stephen Debus has studied or observed all 24 of Australia's resident raptor species during the past 40 years, almost half of them intensively and some over many years. Awarded BirdLife Australia's D.L. Serventy Medal for ornithological publication, his many works include the books Australian Birds of Prey in Flight (2019), Australasian Eagles and Eagle-like Birds (2017) and Queensland's Threatened Animals (2012).