He thinks of the Eurasian tree sparrow, which is not native to North America.
From the stltoday.com
Finally, the American tree sparrow has two distinct white wing bars.
From the timesunion.com
No dusty spot on the chest, and a different color eye strip distinguishes it as not being a tree sparrow.
From the guardian.co.uk
Bird species include the rare tree sparrow, and the lesser spotted woodpecker which breeds in the summer woods.
From the independent.co.uk
Also the eye stripe in chipping sparrows is black with a white stripe above, whereas the same stripes on the tree sparrow are a rusty red with gray above.
From the timesunion.com
The chipping sparrow has glossy black on both upper and lower mandibles, whereas the tree sparrow has black on top and a creamy yellow below.
From the timesunion.com
Five species, including the savannah sparrow, Lapland longspur, white-crowned sparrow, American tree-sparrow and common redpoll are likely to increase in number, according to the assessments.
From the scienceblog.com
He flew up into the tree with the sparrow and proceeded to try to eat it.
From the suntimes.com
A dead tree on South Avalon Boulevard hosts sparrow nests and offers a place to wandering pigeons to perch.