[EBB Sightings] Those late Yellow warblers

I have a gigantic black acacia in my backyard in south Berkeley.  Every year 
I anticipate what (if any) spring migrants will be singing from its foliage 
during April and May.  This year has been disappointingly quiet, for 
whatever reason.  However, these last few mornings I have heard several 
Yellow warblers singing lustily.  In my experience, this species is a 
particularly late migrant in our area.  I've had Yellows moving through my 
yard well into June.