How do I add sounds to the region in my new worldspace. Natural, general abiant sounds like birds etc.

I can't find any tutorials on it and I cannot figure out how to copy the sounds from other regions.

Region sounds are defined on the Sound tab of the Region Editor (World > Regions...). Select your worldspace in the topleft dropdown box and then select the region you want to edit in the list below that box. Sounds can be added by dragging and dropping them from the Object Window into the list of sounds in the Sound tab.

Thanks very much!