Three GPS-tracked Grey Herons Migrated Very Differently but Returned to the Same Breeding Grounds
GPS tracking of three adult grey herons breeding in Poland and Germany showed migration distances from 175 to…
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News about Grey Heron
Research, conservation and important developments connected to this species.
Great Egret and Grey Heron Dominated Many Inland Heron Colonies in South Korea
Across 176 South Korean breeding colonies, two colony groups had more than 90% of nests from large-bodied herons…
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Cadmium, Lead and Arsenic More Than Doubled in Grey Heron Droppings at a Saudi Urban Wetland
Repeated sampling from 2020 to 2023 found that cadmium, lead and arsenic concentrations in grey heron droppings more…
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Haplorchis pumilio Was Found in Hamerkops and Great Cormorants in the Lake Victoria Basin
A 2026 Tanzanian study of intestinal trematodes in four fish-eating bird species detected Haplorchis pumilio in hamerkops and…
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CT and Anatomical Sections Produced the First Integrated Map of the Grey Heron Nasal Cavity
CT scans and matching anatomical sections from three juvenile grey herons produced the first integrated reference for the…
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Helminth Burdens Fell in Cormorants and Grey Herons as Czech Fishponds Became Carp-Dominated
A 2026 comparison of Czech fishpond birds found strong declines in several helminths in great cormorants and lower…
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