Experiments on Causes of Duck Nest Predation

Abstract

The observer-approach method of conducting waterfowl nesting studies has been criticized and defended in turn by many individuals concerned with waterfowl research and management. The main objections have been: (1) the tracks and trails made by the observer are apt to lead predators to the nest; (2) nest markers may furnish clues to certain egg-eating birds and mammals which will result in increased