The hole-in-the-head frog (Huia cavitympanum), endemic to Borneo, can make and hear ultrasonic vocalisations, which allows it to breed in extremely loud streams. Mt Kinabalu, Borneo.
Barakken in Sayap veldstation.
Biologist Merlijn Jocque searches for frogs at night during the 2012 Kinabalu–Crocker Range scientific expedition
