[EBB Sightings] Mystery birds at Arrowhead

Hi East Bay Birders -

While birding at Arrowhead Marsh in Oakland on Sunday I photographed a 
pair of birds that I can't ID.  Can anyone help me with these guys?  I 
got a picture of the male and the female; there is a link to the 
pictures at the end of this message.  They were approximately the same 
size as the House Finches and they had a sweet song, not the buzz of a 
blackbird.  Any ideas?  Thanks! - Mary

http://www.californiabirder.com/mystery/