Passer domesticus
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Male has a plain grey crown bordered by chestnut sides, not the full chestnut cap of tree sparrow
Cheek plain pale grey, without the black cheek spot of tree sparrow
Male shows a black throat bib, small in winter and spreading over the breast in spring
Female is uniformly dull brown; the only clear mark is a pale buff stripe running back from the eye
Back chestnut with heavy black streaks, underparts unmarked greyish buff
Monotonous repeated chirping from colonies under eaves