For those who are not sure how to identify Tree Sparrows.

It's fairly simple to distinguish them from House Sparrows, for as you see in the photo here, the Tree Sparrow on the right can be picked out because of his lovely chestnut head cap feathers & black cheek patch. When you see them side by side like this, you'll notice that the Tree Sparrow is a little smaller, it doesn't have a grey forehead, nor does it have a huge black bib.

For the record, the male & female Tree Sparrow are identical.
House or Tree Sparrow? image
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