TREE SPARROW . — Passer montdnus . 
The Tree Sparrow may readily be distinguished from the preceding species 
by the chestnut head, the triangular patch of black on the cheeks, and the 
browner white of the lower surface of the body. 
This bird is not nearly so common as the house Sparrow, and generally places 
its nest in trees, in preference to thatch and walls. Sometimes, however, it 
follows the common Sparrow in the building of its domicile, and has been known 
to place its nest in the deserted home of a crow or rook, making a dome like that 
of the common Sparrow when building in trees. Occasionally it has been 
observed to build its nest in the hollow of a tree, and to take possession of a hole 
that had formerly been occupied by the woodpecker. The eggs are different in 
hue from those of the common Sparrow, being dullish white, covered entirely 
with very light dots of ashen brown. Their number is generally from four 
to six. 
