ماهو متوسط عمر الدُّوري المُغَرِّد ؟
Adult song sparrows have brown upperparts with dark streaks on the back and are white underneath with dark streaking and a dark brown spot in the middle of the breast. They have a brown cap and a long brown rounded tail. Their face is gray with a streak through the eye. They are highly variable in size across numerous subspecies (for subspecies details, see below). The body length ranges from and wingspan can range from . Body mass ranges from . The average of all races is but the widespread nominate subspecies ("M. m. melodia") weighs only about on average. The maximum lifespan in the wild is 11.3 years. The eggs of the Song sparrow are brown with greenish-white spots. Females lay three to five eggs per clutch, with an average incubation time of 13–15 days before hatching.
11.3 years