Kurixalus appendiculatus — Frilled Tree Frog
Some other names for this species:
Philippine Flying Frog, Rough-armed Tree Frog, Southeast Asian Tree Frog
At Mulu, Kurt and I had seen quite a few small brownish frogs resting on leaves at night, such as this one and this one and this one. At the time, I falsely assumed most of them were the same species, but I was confident that this one was something different, due to its serrated outline. At least I got that right.
The two I saw were both males. Females have even funnier-looking snouts.
- Inger, R. F., Stuebing, R. B., Grafe, T. U., Dehling, J. M. 2017. A Field Guide to the Frogs of Borneo, Third Edition