A monograph of the Common Eider, a large and familiar duck with a long and fascinating cultural history.

A common sight around the more northerly shores of the British Isles, the Common Eider is the largest duck in the northern hemisphere. The eider is particularly well adapted to cold-water environments; the insulating properties of eider down are iconic.

The species is taxonomically interesting, with a range of well-marked subspecies reflecting the patterns of ice coverage during ancient glaciations, and these ducks have also provided the focus for a number of important behavioural studies, especially on feeding ecology and energy budgets.

Eiders have a long association with humans, and have deep cultural significance in many societies. However, modern lifestyles are exposing these ducks to a wide range of new pressures.

This monograph provides a comprehensive portrait of the Common Eider; authors Chris Waltho and John Coulson bring together an extensive and diverse international literature, with sections on taxonomy, habitats, breeding biology, population dynamics, diet and foraging, dispersal and migration, and conservation.

Chris Waltho has studied eiders for more than thirty years, with his research based around the Firth of Clyde, home to the largest population in the British Isles. An experienced aerial surveyor of seaducks and divers, Chris has been the president of the Scottish Ornithologist's Club since 2007.

Over more than 40 years of research, John Coulson has made outstanding contributions to the behavioral ecology of colonially breeding seabirds and our understanding of coloniality in birds. A former Reader in Zoology at the University of Durham, Coulson was awarded the Godman-Savin Medal by the British Ornithologists' Union in 1992.