Based on manual Koskimies, P. & Väisänen, R. A. 1991. Monitoring Bird Populations. A Manual of Methods Applied in Finland. Zoological Museum, Finnish Museum of Natural History, 144 pp.
Waterbird point and round counts
Based on manual Koskimies, P. & Väisänen, R. A. 1991. Monitoring Bird Populations. A Manual of Methods Applied in Finland. Zoological Museum, Finnish Museum of Natural History, 144 pp.
Waterbird point and round counts