‘Whup’ and ‘grumble’ calls reveal secrets of humpback whales

Sounds made by humpback whales — including a previously unknown call — have given researchers a glimpse of their lives in the high seas. Scientists …

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Zebra finch males sing in dialects and females pay attention

Male zebra finches learn their song by imitating conspecifics. To stand out in the crowd, each male develops its own unique song. Because of this …

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