Water regime as a key factor differentiating habitats of spotted eaglesAquila clangaandAquila pomarinain Biebrza Valley (NE Poland) Maciorowski, Grzegorz ; Mirski, Paweł ; Kardel, Ignacy ; Stelmaszczyk, Mateusz ; Mirosław-Swia˛tek, Dorota ; Chorma´ski, Jarosław ; Okruszko, Tomasz Abstract Publication: Bird Study Pub Date: January 2015 DOI: 10.1080/00063657.2014.972337 Bibcode: 2015BirdS..62..120M