Adult male proboscis monkey has a large nose that dangle below the mouth. It's like Squidward. Apparently it's used for producing sound and natural selection prefer the louder one. Image credit: https://eol.org/pages/310436 It is endemic to Borneo and is critically endangered. Coincidentally a comrade in Origami Dan, Naoki , asked me to join force for raising awareness on endangered species. From now on, my every design with endangered species will have the red stamp with tarsier face.
Notes about origami design and fold