What is it?

Yesterday, I was disappointed in not finding any Yellow-heads or Bobolinks -- but I did come across a number of birds I could not ID. I like to take pictures more than just watch birds -- that's why I don't keep any life list or those other check-off lists that seem to drive so many birders.

Yes, I know that's a Song Sparrow.

But what is this? Are sparrows (if that's what it is) changing into their fall camouflage already? I have 4 field guides on my desk -- and they didn't help.

And what is this? With the distinctive head & tail markings it should be easy to identify -- but I can't.
(click on pictures to enlarge)