Provides a concise guide to the various census techniques and the opportunities and pitfalls which each entail. The common methods are described in detail and illustrated through an abundance of diagrams showing examples of actual and theoretical census studies.
`...an important and substantial update of an extremely valuable book. It is a 'must' for any bird-surveyors, volunteer and professional alike, who do not have the first edition - and probably also for those of you who do have.' Juliet Vickery, British Birds

Bat Detectors




