American Tree Sparrow (immature)
Spizelloides arborea

f6.7 @ 1/4000s, ISO:1000, Nikon D3S w 500mm and 1.7X teleconverter

"Tree Sparrow," Wikipedia, the free encyclopedia. The American tree sparrow, also known as the winter sparrow, is a medium-sized sparrow. Adults have a rusty cap and grey underparts with a small dark spot on the breast. They have a rusty back with lighter stripes, brown wings with white bars and a slim tail. Their face is grey with a rusty line through the eye. Their flanks are splashed with light brown. They are similar in appearance to the chipping sparrow. Their breeding habitat is tundra or the northern limits of the boreal forest in Alaska and northern Canada. They nest on the ground.
Francis A. Crane Wildlife Management Area, East Falmouth, Massachusetts