20th September 2025 (16 Topics)
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Light Pollution and Birds
Context:
A global study shows artificial light at night is extending activity hours of birds, disrupting natural rhythms and ecosystems.
Impact on Bird Behavior:
- Birds in brightly lit areas remain active nearly an hour longer than in darker areas.
- Large-eyed species and open-nesters are most affected, while small-eyed and cavity-nesting species are less impacted.
- Migratory birds and breeding-season activity show the most pronounced changes.
Ecological Consequences:
- Altered activity affects feeding, reproduction, and migration.
- Disruption of circadian rhythms may cascade through food chains, impacting plant-pollinator interactions and insect populations.
- Fireflies and other nocturnal species also face survival challenges due to artificial lighting.
Technological and Citizen Science Role:
- Use of AI-powered platforms like BirdNETand volunteer acoustic networks (BirdWeather) enables large-scale monitoring of bird vocalisations globally.
- Data reveals species-specific responses to light pollution, supporting targeted conservation strategies.
Mitigation Potential:
- Unlike habitat loss, light pollution is reversible: streetlights can be shielded, billboards dimmed, and lights switched off when unnecessary.
- Behavioural interventions can reduce light pollution effectively without large financial investments.
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