Nesting Boxes on Poles.
The following are some approximate measurements for nest-boxes:—
For Titmice:
| height, 11½ inches; depth from back to front, 4½ inches; diameter of round opening, 1¼ inches. |
For birds of the size of a Starling:
| height, 18½ inches; depth back to front, 9 inches; diameter of opening, 1¾ inches. |