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flag Wild dolphins in Florida use unique signature whistles like names, especially when alone or in murky water, a study shows.

flag A long-running study of bottlenose dolphins in Sarasota, Florida, has found that wild dolphins use unique signature whistles—similar to names—to identify themselves, especially in isolation or low-visibility conditions. flag Researchers recorded nearly 1,000 whistle sessions from over 300 individuals using hydrophones attached during health checks, confirming that about 85% of whistles in isolation are signature whistles. flag Dolphins modify their whistles when speaking to calves, a behavior akin to human "motherese," and may copy others’ whistles to initiate contact. flag Females tend to keep stable whistles over time, while males may change theirs, especially during long-term male bonds. flag The study also revealed shared non-signature whistles used by multiple dolphins, suggesting complex social communication. flag The research, ongoing since 1970, remains the world’s longest study of wild cetaceans.

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