Listen on posterous
Image by Rock Portrait Photography via Flickr
I can only assume these are cicadas, but initially I heard the noise floating around in great circles around the oldest temple in Cambodia.
I wondered if the noise was made by some small vehicle used to transport security or guides up and down, but then I realised that I hadn't seen any vehicles in this area. The next, far less possible, option was that it could be the island thing from Lost. It certainly gave me that same creepy feeling and we were in a jungle.