American Tree Sparrow. The american tree sparrow often occurs in flocks of up to 50 birds. Climate threats facing the american tree sparrow.
The american population is sometimes referred to as the german sparrow, to distinguish it from both the native american tree sparrow species and the much more widespread english house sparrow. Burtt, post standard (syracuse, new york), 9 may. 2003 (a phylogenetic analysis of the emberizid. In habitat and behavior, they are much like field sparrows , but american tree sparrows are more frequent at bird feeders.
It had been classified under the genus spizella, but multilocus molecular evidence.
American tree sparrow (spizelloides arborea) bird sounds on dibird.com. American tree sparrows average 5.25 inches in length (including its slim, forked tail). Adults have a rusty crown and grey underparts with a small black spot on the breast. The american tree sparrow (spizella arborea) prefers colder climates and spends summers in northern canada and alaska, while it winters in the northern parts of the united states.
