A bluebird that wants to sell you a ringtone.
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This bluebird asks, 'Would you like to buy a ringtone?'

If you're as inundated with technology as I am, you may have forgotten that tweets didn't originally come from Twitter; they are actually sounds that birds make. Up in trees, I suppose.

Sprint is hoping to remind its customers with a new set of bird call ringtones, including such sure-to-be chart-toppers as "Downy Woodpecker" and "Kentucky Warbler." The 28 ringtones come in association with the Audubon Society and hurt my sensitive ears.

That probably means I should go outside more often.

You can preview the bird calls here, or text "BIRD" to the number 1111 if you're a Sprint wireless customer.