![]() You can also remove the extra “foothold” pieces on the top of the box and the perch as the Swallows don’t need them. You can remove the porch if you want to and I made mine to open from the side which made it much easier to access the nest. This allows 3 or 4 chicks to beg for food at the same time making for more even food distribution among them. The main entrance hole (for the adults) is 1 1/2″ and the other three (for the chicks) are each 1″ in diameter. This nest box should be at least 10″ long and at least 7″ wide with the backboard at least 6″ high and the front board 8 or 9″ high. For this to work the hinge has to be very close to the bottom of the box and the floor needs to be raised to allow the door to open. This allows you to peek into the box with less disturbance to the nestlings. Note that I have changed the design to open the door from the top. This is my favorite plan for a bluebird nest box. You can use a round hole 1 1/2″ diameter entrance hole for this Bluebird House and it will also be used by Tree Swallows and the Titmouse. You can just crack the side open an peek in when needed. This makes it easier to look in on the nest without having to open the door too far. Since this post was created I have changed the designs of the side opening boxes to open from the top. You can also download my Nest Box Specifications PDF file that will give you the dimensions and information on all the cavity nesting species nest box sizes, entrance hole sizes and height to mount the boxes. There are instructions at the bottom of this page to make your own or you can purchase them here. ![]() ![]() They will help keep out cats, raccoons and other climbing predators. Please place predator guards on any posts, poles or trees where you mount your nest boxes. If you want a detailed, step-by-step instruction book on how to build, mount, place and protect birdhouses, along with a nest box specification table and everything else you need to know to have baby birds hatching and growing up in your yard, you can download my free ebook here. I have put together a variety of birdhouse plans for you so that you can make your own birdhouses and enjoy watching birds breed and raise their young in your own backyard.
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