Two easily identified common sparrows...

Photos by BarrytheBirder

White-crowned Sparrow / left above

and White-throated Sparrow / right above

White-crowned Sparrow

(Zonotrichia leucophrys)

It nests in stunted trees and thickets; winters in woodland, brushlands, and hedgerows.   Generally uncommon in much of eastern Canada and northern America states but much more numerous farther west.

 White-throated Sparrow

(Zonotrichia albicollis)

Common in eastern Canada and U.S.   Nests in brushy coniferous  and mixed woodlands.   Winters in woodland undergrowth, brush and gardens.

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Barry Wallace