The Center for Biological Diversity announced this week that 100,000 free ringtones had been downloaded from its endangered species ringtone site [1]. They've also given the site a make-over, and it's much prettier and easier to use now.

Curves magazine says, "This assortment of natural sounds is in sharp contrast to the jarring jangle of most electronica and an educational reminder about the extinction crisis." All I know is that the Mexican gray wolf on my wife's phone freaks our cat out every time she gets a call, an unexpected side benefit. You can also get the polar bear, blue-throated macaw, northern goshawk, California red-legged frog, and American pika, among others.

Download a ringtone yourself [2], and help get them started on number 200,000.