Great Cormorants Increased as Southern Baltic Diving Seabirds Stayed 40% Below Early-1990s Levels
A 35-year analysis of Polish Baltic winter surveys found strong growth in great cormorants, while the wider diving-seabird…
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Research, conservation and new discoveries
A continuing selection of new studies, conservation projects and important developments connected to species in the archive.
A Single High Lead Dose Altered Blood Cells in Great Tit Chicks
A single high experimental lead dose made red blood cells smaller and increased nuclear abnormalities in great tit…
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Poland’s Breeding Great Egret Population Reached 1,150–1,250 Pairs
Poland’s breeding great egret population increased by 84% from 2013 to 2025. Breeding was documented at 31 sites,…
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Half of Headstarted Eurasian Curlews Explored Beyond Their Main Area Before Migration
GPS tracking of 34 headstarted Eurasian curlews in Poland found that 17 moved outside their main post-release area…
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Rook Breeding Numbers Fell 42–62% in Several Regions of Northern and Western Poland
Surveys across northern and western Poland counted 26,318 occupied rook nests, while comparable regional datasets showed declines of…
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European Rollers disappeared as breeding birds from southeastern Poland after 2022
Long-term monitoring in southeastern Poland recorded 43 occupied European roller sites in 2009, but breeding disappeared after 2022…
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Artificial Islands Became Poland’s Only Permanent Pied Avocet Breeding Site
Two dredged-sediment islands held 85 breeding pied avocet pairs in 2025, but rapid vegetation growth could close the…
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Cormorant Colony Was Estimated to Consume 4.2–32.4 Tonnes of Fish Annually at Raszyńskie Ponds
A 2026 Polish study estimated that the great cormorant colony at Raszyńskie Ponds consumed 4.2–32.4 tonnes of fish…
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Two Models Estimated 13.5–19.6 Million Wild Boar Across Europe’s Core Range
Two independently calibrated models estimated about 13.5 million and 19.6 million wild boar across Europe’s core range before…
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Great Spotted Woodpeckers Excavated More Cavities per Tree in Managed Polish Forests
A study of 173 nesting trees in Poland found more multiple-cavity trees in commercially managed forest, which the…
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Poland Removed Five Bird Species from the Game List
Effective 2 January 2026, Poland removed common pochard, tufted duck, Eurasian coot, hazel grouse and Eurasian woodcock from…
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