These two pictures are of the common house finch. The top picture is the male with all his bright coloring. The bottom picture is a female(left) with a juvenile male, probably her offspring.
I recently painted a house near Elbert, CO and in one of the outbuildings I spied this robin siting on her nest. It took me a few tries to actually catch her on the nest as she was pretty wary and would fly off as soon as I entered the structure.
