Background Sound

I like some peaceful ambient noise when I work. I particularly like bird sounds.

Recently I found this site from Haagen-Dazs that has a wonderful forest soundtrack. I open a tab in my browser and just keep it on this page all day so I can hear the birds.
http://www.helpthehoneybees.com/#/home/home/

This site is a fund-raising site for honeybee research. Honeybees are in trouble, which is bad news for anyone who eats.
See this NYT article about it:
http://www.nytimes.com/2007/02/27/business/27bees.html?_r=1&oref=slogin
Haagen-Dazs is trying to raise money to try to figure out why the bees are dying, and that's what the site is for.

I used to use this site:
http://www.iserenity.com/environments.htm
which isn't bad either, but the bird sounds don't echo as much, and somehow it feels slightly less like a real forest.