Dena Clink is a primatologist studying individuality and variation in Bornean gibbon calls, which she says could aid these primates' conservation. She joins this episode to play some recordings of these fascinating songs & calls she’s made in the course of her research, and explain how they're used and what they may mean to the species. We’ve featured a wide variety of bioacoustics studies here on the Mongabay Newscast, from whales to bats and birds, but these are usually recordings of species at the population level. Our guest today focuses on how calls vary between each gibbon, and what that can teach us about the animals, and their conservation needs. Here’s this episode’s top news: Malaysia’s last Sumatran rhino dies, leaving Indonesia as the final refuge Indonesia fires emitted double the carbon of Amazon fires, research shows Amazon deforestation rises to 11 year high in Brazil Agroforestry program in Appalachia receives $590,000 in federal funding If you enjoy this show, please invite your friends to subscribe via Android, Apple Podcasts, Google Podcasts, Stitcher, TuneIn, Spotify, Pandora, or wherever they get podcasts. Please visit www.patreon.com/mongabay to pledge a dollar or more to keep this show growing, Mongabay is a nonproft media outlet and all support helps! From now until the end of December 2019, donations to Mongabay are being doubled by Newsmatch, making this the best time to support our independent news about conservation science and the environment, visit mongabay.org/donate to learn more. See our latest news from nature's frontlines at Mongabay's homepage: news.mongabay.com or find us on Facebook, Twitter, and Instagram by searching for @mongabay. Photo of a Mueller's gibbon (Hylobates muelleri) via People Resources and Conservation Foundation. Feedback is always welcome: submissions@mongabay.com.