Soft-pencil illustrations shaded over with pastel blue and pink make Snowbird look like just another innocuous backyard visitor. Yet Michelle's father, who reassures her when Snowbird (a junco with distinctive tail feather markings) is absent from the feeder for several days, knows more about bird life than most authors bother to tell. Feeding and migration patterns, the territories of winter flocks, and the ""food line"" (or pecking order) are woven unobtrusively into a bird watch conducted with a minimum of fiction and fuss.