I set up a birdbath in the backyard, and now I see little birds splashing in it every day.

birdbath 是由 bird（鸟）和 bath（洗澡、沐浴）组成的复合名词，字面意思是"鸟洗澡的地方"，指专门为鸟类提供的水盆，通常放在花园或院子里供鸟儿饮水、洗澡。