The Rainbow Bird Bath was a decoration in FarmVille. It can be sold for 12,500 coins.
It was available for 13 days between March 17th, 2011 and March 30th, 2011.
The decoration had an initial cost of 250,000 coins, and awarded 2,500 XP for the purchase.
It was re-released on August 25th, 2012 as a reward for finishing Hawaiian Paradise Chapter 10 Quest 7: Hey Shrimp.