Six Flags mommy dolphin practices 'baby whistle'

San Francisco ChronicleSix Flags mommy dolphin practices 'baby whistle'San Francisco ChronicleDolphins are known for their exquisite communication skills, but a late-term, pregnant dolphin at Six Flags Discovery Kingdom in Vallejo may be one of the first discovered vocalizing to her unborn baby. Bella, a 9-year-old bottlenose, caused a double ...