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Low Danube waters bring huge mayfly swarms in Budapest
Mayflies swarm the river Danube earlier than usual and in greater numbers:: Budapest, Hungary:: July 23, 2025:: Gyorgy Kriska ...
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The Stream, July 29, 2025: Stretches of Colorado River Declared ‘Positive’ for Invasive Zebra Mussels After New Discoveries
Swarms of mayflies have overtaken Budapest, Hungary, following heat waves and low water levels on the Danube River. ● In Monterey County, California, a grant to fund drinking water improvements for a ...