Read about this in Vegetarian Times (yes, you may roll your eyes heavenward now). It's through the Center for Biological Diversity, one of those watchdog groups that wants to make sure we don't kill out every species of plant and animal on the planet. They've made recordings of rare and endangered wildlife available to use as ... wait for it because the irony is heavy ... ringtones for your cell phone.
Pretty cool if you ask me. But then again, I'm a tree hugger. Just ask my neighbors and my 6 foot tall compost heap.