Roberto G. Valle, Affef Baaloudj and Emiliano Verza / February 2022 – vol. 115, issue 2, pp 95–99 Abstract Monitoring populations of waterfowl can be a difficult task owing to their nest sites being difficult to access and the need to avoid disturbance to breeding birds. This study describes a new method for counting breeding Mute Swans Cygnus olor, across a large wetland in Italy, using satellite imagery from Google Earth. The results are compared against traditi... This article is only available to registered users.To read more, please log in or purchase a subscription.