Select the best. 

You will not find a better constructed birdhouse with the features that this house offers.   Your choice of oval, round or slotted entrance hole.  Unless specified it will be with the oval opening.  Features include,  1 in Yellow pine lumber which is much harder wood than the cedar lumber and will give many years with proper care.  Rounded edges, oversize roof, Recessed floor, Front panel that is designed to open from the top. Grooved inside front allowing for easy exit by young, adequate ventilation, floor with mitered corners for vent and drainage.    CARE AND HANGING INSTRUCTIONS INCLUDED.  See below for specific features. 

Features include

0. Construction
   0. Constructed from seasoned hand selected 1” yellow pine lumber.
0. Specifications
   0. The overall specifications are H=18", W=7 1/4", D=9 3/4".  It has an oval shape entrance hole size of 1 3/8” x 2 ½”., which is centered approx 8” above floor. 
0. Entrance
   0. You select either a slot, round opening or the regular 1 3/8” x 2 ½” oval entrance (Your choice)
   0. If no choice is made, order will be shipped with regular oval shaped hole.
0. Assembly
   0. My houses are assembled with rust resistant decking screws for strength and durability.
   0. Although it is easier and much faster to assemble a house with Brads, staples and nails they have a tendency to loosen after a year or two and cause the house to separate at the joints.  Always buy houses that are assembled with screws.
0. Slanted Oversize roof.
   0. It is important for the roof to be slanted so that the water will drain off freely, and the oversize roof minimized any water penetration at the top and sides.
0. Slanted body
   0. The slanted body is useful in making it harder for predators to gain access to the nesting area.
0. Ventilation
   0. Ventilation is provided to help control over heating of the nesting area. The buildup of heat in the house is a main problem for the bluebird and every effort should be made to help reduce this by ventilation, color, and placement of the house
   0. There is a ventilation gap of approx ½” above the front panel and on each side of the house at the peak of the roof to help cool the house in hot weather.
0. Cleaning and observation
   0. The front panel swings down from the top by loosening the top screw on the side above the entrance hole.  This allows for easy cleaning and viewing of the nest area to observe the young.
   0. Houses that open by removing or hinging the top are difficult to clean and the house should be cleaned after each brood.
0. Mounting
   0. These houses have predrilled mounting holes for mounting to a wooden post, building, tree etc.  however the recommended mounting method is to a metal post which helps in predator prevention.
   0. Mounting brackets for mounting to a farm T post are available for $1.50 ea.  You can also mount to a 1” round pipe and clamps, which are available at most hardware or plumbing stores.
0. Weather protection
   0.  All woods are subject to deterioration, splitting, warping and cracking from the elements.  Even the houses of cedar construction are subject to deterioration.  A good coat light colored paint will prolong the life of this house and should be repainted occasionally to keep water from penetrating the wood. 

Taking your house down for the winter will also prolong its life but if bluebirds reside in your area all year long as they do where I live, they also like to use their house during the winter months as a roosting box to escape the harsh winter elements.  Clean your house after each brood has left the house and the bluebirds may nest up to 3 times during a season.