Sound Answer?: Can you identify the warbler singing in the background?....

.....and if you go to:

http://www.xeno-canto.org/browse.php?species_nr=&query=Nuttall%27s+Woodpecker

Listen to the 2nd version of the Nuttall's Woodpecker from the top of the page*.

Which warbler is singing in between call notes of the woodpecker?

(* = The 1:01 recording is from the work of Thomas C. Graves.)

Hint: It's an early arrival in central and northern California, with migrants arriving
as early as the first week of February some years.

If you seek the answer, please email me and I'll reveal it: danieledelstein@att.net
(The subject of the answer is shown below.)

Meanwhile, I have a San Francisco bird tour soon, so I am getting ready to leave...and, hence, will do the same here. Enjoy. DE.