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The World

BirdNote ® Night Voices

In the evening, most birds fall silent as darkness falls. But for some birds, known as nightjars, it’s time to strike up their particular songs.

Bird Population on Decline in Britain

Environment
The World

Science Note: Early Birds

Just Say No to Cerulean Warbler

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The World

Bird Songs

Birds sing to communicate to each other. And mostly, it’s the males who do most of the singing. In Massachusetts, a biologist is studying the song of the Chestnut-sided Warbler to find out how and why the male attracts females. Nancy Cohen reports.

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