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Acoustic monitoring of especially threatened landscapes has become a key tool for conservationists. While passive acoustic monitoring – the deployment of acoustic sensors that remotely record all sounds – can be used to understand chimpanzee behaviour (as we showed here), it can also be used to assess soundscapes, adding context to primate vocalisations and also informing on the acoustic inventory. That is, what calling species are present, when do they vocalise, and how does the environment affect this key communicative behaviour? Our deployment of Song Metres allows us to better understand these questions.

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