Nandi is the name for the bull which serves as the mount of the god Shiva and as the gatekeeper of Shiva and godess Parvati. It is believed that whispering your prayers in the Nandi's ears will reach Shiva and some people do close one ear and whisper into the other, as they don't want the wish to leave through the other ear.
Morning walk across the bridge constructed over river Godhavari - India
Even though they don't communicate, but together they make a strong statement