By Sébastien Reeber Christopher Helm/Bloomsbury, 2015; hbk, 656pp; 72 colour plates, 650 colour photos, distribution maps, black-and-white illustrations ISBN 978-1-4729-1234-3, £34.99 This impressive volume covers the identification and ageing of 83 species of ducks, geese and swans that breed in North America, Europe and Asia. In essence it deals with all the species that occur regularly in the entire Holarctic region, including the probably extinct Crested Shelduck Tadorna cristata . Not included are a few breeding species from southern Asia such as Wandering Whistling Duck Dendrocygna arcuata , Sunda Anas gibberifrons and Andaman Teals A. albogularis and the possibly extinct Pink-headed Duck Rhodonessa caryophyllacea . These species, a small number of vagrants to the region and others that have occurred only as escapes from captivity were covered in Madge and Burn's Wildfowl: an identification guide to the ducks, geese and swans of the world (Helm, 1988). Compared...