Robert Cheke is Professor of Tropical Zoology at the University of Greenwich. His work has taken him to sub-Saharan Africa, where he has followed his passion for sunbirds. The late Clive Mann carried out extensive fieldwork into bird ecology in the tropics. He wrote numerous scientific papers and books, including Cuckoos of the World.Richard Allen’s work has appeared in various books including Cuckoos of the World. He won the Birdwatch and Swarovski Optik Artist of the Year award in 2023.