[EBB Sightings] My White-throated sparrow is back

I don't expect anyone to remember this, but last spring I had a 
White-throated sparrow in my backyard in south Berkeley (near Telegraph & 
Ashby).  It was last seen April 27 and was, in fact, the last zonotrichia 
sparrow to depart.  Well, I just saw a White-throated eating seeds on the 
railing of my back deck.  I can't be sure, but I have the feeling it's the 
same bird that was here last spring.  It's always amazing to me that these 
birds can travel so far and then find their way back to the exact location 
where they wintered (or bred!) previously.