8 Miscellaneous Circular 18, U. S. Dept. of Agriculture. 
HOUSE TRAP. 
Where premises are large enough to justify establishing a per- 
manent station, a house trap (fig. 6) will give excellent service. 
Select a location adjacent to trees or shrubbery, and set up a 
framework about 5 feet square and 6 feet high, of 2-inch uprights, 
such as may be made by ripping 2 by 4 inch timbers. Three extra 
uprights will be needed to make a vestibule and casings for the doors 
Oe! 
Doors HOUSE TRAP 
lic. 7.—Ground plan of house trap shown in Figure 6. The drawing illustrates the vesti- 
bule and the correct position of doors when trap is set. 
(fig. 7). Cover this framework with woven-wire netting of mesh 
not larger than #-inch. Stretch a piece of the netting between two 
extra uprights that are placed 2 feet apart and 18 inches from 
one side, thus making a vestibule or partial partition in the trap. 
A door frame is made of light, narrow pieces of lumber, covered 
with the wire netting, and hinged so that it will open énéto the 
vestibule. The inner opening is provided with two doors, of which 
only the tops and hinged sides are of wood. The inner edges and 
bottoms of the doors are formed by a heavy wire (or a 4-inch soft- 
iron rod), which serves merely to stiffen the netting. This provides 
a minimum of visual obstruction to any bird that may be entering. 
Do not have a threshold under the doors, as most birds will not cross 
one, even though it is made level with the ground. 
