At that season it is frequently mistaken for the chipping sparrow, but the 2 rarely overlap in winter. The American tree sparrow often occurs in flocks of up to 50 birds. In habitat and behavior ...

But then over the past few years I got waaaaaay into birding (normies refer to it as birdwatching) and learned that one of these brown birds, the Eurasian Tree Sparrow, wasn't actually that boring ...