@pbsnews: While climate change "absolutely" plays a role in the decline of bird populations, scientists are still working to understand how drought and sea level rise are actually impacting them, ornithologist Peter Marra says. Drought and sea level rise are having "subtle, but really profound effects" on birds, he told Horizons host William Brangham. Birds are an important part of life on Earth by helping to grow food, keeping pests at bay and spreading seeds across the globe. But a new study in the science journal Nature indicates that more than half of all migratory bird species are in decline. Horizons from PBS News, dives into the science, health, technology and environmental issues making headlines each week. Visit the PBS News website to watch this week's episode. #pbsnews #pbs #pbsnewhsour #horizons #birds #climatechange

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Saturday 01 August 2026 16:00:00 GMT