Abstract
In autumn 2025, an unprecedented mass mortality event was observed among the western migrating subpopulation of Eurasian cranes (Grus grus) in Germany. Systemic infection with highly pathogenic avian influenza virus H5N1, clade 2.3.4.4b, genotype DI.2.1, was identified as the cause of acute death. The gregarious behavior of cranes at feeding and resting sites likely has contributed to the rapid and massive dissemination of viruses within the crane population.
Competing Interest Statement
The authors have declared no competing interest.
Funder Information Declared
European Union, 101084171
Source:
Link: https://www.biorxiv.org/content/10.64898/2025.12.08.692485v1
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