On my last night in Danum Valley, my guide was leading me across a large field in the employee housing area when I noticed a frog hop in the wet grass. I thought the frog looked new to me, and would have spent a little time to get a decent photo, but someone in front of us had seen a Leopard Cat, so we rushed in that direction instead. I did get to see the (housecat-sized) wild cat for a moment, but I didn't get a photo.

Thanks to Borneo frog expert Alexander Haas for identifying this frog for me.