Müller's Gibbons AKA Southern Grey Gibbons have ash grey fur and a contrasting facial ring. They sing in powerful dawn duets 🐒🐵📢🎶🎷 to mark territory. Don't let the forest of #Borneo 🇮🇩 go silent! #BoycottPalmOil 🌴⛔️ #Boycott4Wildlife

palmoildetectives.com/2021/02/…