Indonesian conservationist Sasha tells me about gibbons (Sasha has a longer name but this audio is repurposed from something else and we didn’t involve her employer’s Communications team, so we’re staying on first name terms to keep it simple). The impetus to turn my chat with Sasha into an episode of Conservation Sound was the cheering take-up of two previous episodes at an event and on the radio. I had a grand plan of creating a delicious work from my Hainan gibbon recordings, with Sasha as a narrator, but I have accepted that if I try that sort of project again by myself it will never happen! So here, with reasonable speed, you can learn about the sound of gibbons. There is much more to a say about that subject, books, papers, even whole websites, so this is just a taster.