Two and a half inches is about the proper depth of water for a bird bath, with five inches the 
maximum for blue jays and grackles. A successful bath may be provided with an arrangement of 
steps under water, giving shallow spots for the bird’s cautious entrance and deeper places for his later 
delight 
From a hearty meal at the food tray birds may fly directly to the bird bath, entering the 
shallowest water first, then sousing themselves thoroughly in the deepest part — with no respect for 
theories regarding a bath too soon after dinner 
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