I found this page incredibly easy on google, but incase someone haven't been able to find it.. or don't know that they want to find it :S
http://www.partnersinrhyme.com/soundfx/Ambience.shtml
Great job that you found this.
However...
Quotehttp://www.partnersinrhyme.com/pir/PIRsfx.shtml
Royalty Free Sound Effects has a giant database of your usual Sounds, from those human screams, moans, and whatever to animal sounds. I don't know how giant the sound archive is, but it seems to be free in this case, unlike their music, which costs around 90 dollars...
http://forum.chaos-project.com/index.php?topic=1835.0
...Does anyone look in that topic anymore...