What is that bird at your copper birdbath?  If you live up in the high mountains, it may be a Brown-capped Rosy-Finch.  These birds are, however, fairly rare. 

You’ll only see one at your bird feeder if you live in Colorado.  In fact, the Brown-capped Rosy-Finch has the smallest living area of all three American Finch species.  They generally live and breed up above the timberline at the highest part of the mountains.  The male Brown-capped Rosy-Finch is a medium-sized finch that has cinnamon colors on its breast, face, neck, and back.  Its forehead is black, and it features some pink and red on the rump, belly, and in its wings.

Brown-capped Rosy-Finches build their nests in crevices and niches where they are kept completely in the shade.  The female builds the nest completely on her own, and it usually takes her about three days to complete it.  They line the nest with fur, feathers, and even loose grass.  Some nests have even been found with bits of cloth and other materials in them, although since the Brown-capped Rosy-Finch lives so far up in the mountains, this is rare.