Pine Warbler (Dendroica pinus)
Appearance is untreated olive above with a yellow throat and breast with blurry streaking below and a white belly.  Its nests of pine needles are generally near the tip of a horizontal branch.  It nests exclusively in pine trees, spending most of its life there.  Relatively rare and usually found only inland northern settings.  Length, five and one-half inches.  Weight, 0.6 ounces.