Hey Guys,
This is a tricky one. Dave, check out the tail of this bird and notice that it is rather blackish with big white tail spots. This pattern rules out a Yellow Warbler (though it is a Dendroica warbler). The actual pattern is helpful in ruling out a couple of candidates. Notice too that there is a hint of white wing bars on the birds left wing, also wrong for Yellow Warbler. Lastly, pay close attention to the color of the underparts, somewhat pale yellow-ochraceous, and notice that the color extends all the way down to include the undertail coverts. Those features may get you to the correct answer with a bit of sleuthing. Remember, we're dealing with a "confusing" fall warbler.
Chris