My contribution to Eileeninmd's Saturday's Critters #114. (I missed TexWiscGirl's Good Fences #100, but you should visit!) And I'm also linking to Michelle's Nature Notes (#350).
The sparrows cleared out a dust bath circle for themselves.
By the way, that's an upside-down frisbee I'm using for a bird bath. Mouse over pics for captions, and click them for larger versions.