The names of warblers have been changed like crazy over the past few years. This little guy with his raccoon-eyes is now the Common Yellowthroat - not to be confused with the Yellow-throated Warbler, which is rare.
We are now at the end of the warbler migration, as these tiny jewels illegally migrate from Central and South America to their breeding grounds in the north. This common warbler loves to skulk in thick underbrush, especially near water, but his loud, penetrating song gives him away.
Song, and info, here at CLO.