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In this episode, Chris Packham reveals some of the cleverest animal communicators on the planet.

For decades, people have longed to emulate Dr Doolittle and be able to understand what animals are communicating to one another. But their methods often go far beyond the capabilities of our human senses.

Now, thanks to dedicated researchers, new science and cutting-edge technology, we鈥檙e being given a glimpse into the ingenious ways that animals get their message across - that dolphins have individual names for each other, that cuttlefish use covert signals, and that humans can understand apes without even realising it.