Waterbird counts on large water bodies: comparing ground and aerial methods during different ice conditions

• Published in: PeerJ
• Main Authors: Marchowski, Dominik, Jankowiak, Łukasz, Ławicki, Łukasz, Wysocki, Dariusz
• Other Authors: West Pomeranian Nature Society (ZTP), Polish Society for the Protection of Birds (OTOP)
• Format: Article in Journal/Newspaper
• Language: English
• Published: PeerJ 2018
• Subjects: Anas acuta; Aythya marila; Cygnus cygnus; greater scaup; Mergellus albellus; Northern Shoveler; Shoveler; Whooper Swan; smew
• Online Access: http://dx.doi.org/10.7717/peerj.5195; https://peerj.com/articles/5195.pdf; https://peerj.com/articles/5195.xml; https://peerj.com/articles/5195.html

The aerial and ground methods of counting birds in a coastal area during different ice conditions were compared. Ice coverage of water was an important factor affecting the results of the two methods. When the water was ice-free, more birds were counted from the ground, whereas during ice conditions...