Made in the USA. The plans can be used to attract either Westerly or Eastern Bluebirds. Large roof overhang and floor size. 0. Opening: 3. bluebird houses can also have a 1 3/8 whatchamacallit 2 1/4 inch vertical oblong hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front on and box . Attract bluebirds to nest in your backyard. Constructed out of Eastern White Pine. How to Build a Bluebird House. Easy open for monitoring and cleaning. The most common problems are the House Sparrow, Raccoons, and Rat snakes. Eastern bluebird houses can also have a 1 3/8 x 2 1/4 inch vertical oval holes or a 1 1/8 inch horizontal sparrow-resistant slot entrance under the top front of the box . Erva Bluebird Feeder. Wait for birds. Mount on a tree or outbuilding. Ravenox Sparrow Resistant PVC Bluebird House. Some great inexpensive books on building bird houses: Approximately 1 dozen cavity-nesting birds will use boxes with a 1 1/2" entrance hole. Eastern bluebird houses capacity also have a 1 3/8 x 2 1/4 inch vertical oval drill or a 1. It has a 5″ by 5″ floor (inside dimensions) and 8″ floor to ceiling height (inside front). Everything you need go have success is bluebird houses! Includes PDF plans, DIY movie tutorials & the BEST pre-made nest boxes. 1. Troyer’s Sparrow-resistant Bluebird House and Pole Bluebirds are territorial, they protect a radius of 150’ so, place your house(s) 300’ apart, in an open location, not too close to trees. Easy open for monitoring and cleaning. 1/8" wire Entry Detail 5/8" 2" 7/8" Remove 2 1/4" dia. 75"H each. Dimensions: This Bluebird house mounts on a 1/2" hollow ground pole. We utilize two types of predator guards to help limit predation of our bluebird nest boxes. The House Sparrow, upon discovering that its nest is gone, may usurp the bluebirds nest and kill the parent bluebird. Cedar Roof measurements: 9" x 7-¼" x 1". Eastern blackbird houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole either a 1 1/8 inch horizontal sparrow-resistant slot entrance at the above head of the box . Cut a 22-degree bevel across the top of the front section (A). 3-1/2 x 1-1/8 inch slotted entry hole. Once the bluebird babies are 7 to 10 days old you can change the nest to keep it parasite free. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. 12 Month Prepaid Bird Watching Subscription – 3 patches a month. 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. If the entrance hole is too small, then the birds cannot get in. This box has a shallow 4 1/2 inch drop from the bottom of the entrance hole to the floor, and a small, round nesting cavity with a 4 1/4 inch diameter. 99 USD Regular price. Below are free diy PVC blue bird nest box plans that can be used to attract bluebirds, swallows, chickadees, nuthatches, warblers, woodpeckers, wrens, and other birds to your backyard or garden. Bring Back The Bluebirds - Even on Your Hand. Find perfect accommodations for your blues. Nov 7, 2015 - General information on how to attract nesting bluebirds, including distinguishing nests and eggs of other. These will be used for the 1 1/2" galvanized screws that will function as hinges for the front door. Bird Houses Diy. Install the front. Home;. 5” and the walls are about 9” high. Everything you need to have success with bluebird houses! Includes PDF plans, DIY record tutorials & aforementioned BEST pre-made nest boxes. The holes should be positioned in the top left and right corners. 00 / month. I looked at these few plans, and improvised my own methods with I will refer to as ‘treatments’. Prior to installing the new nesting boxes, all but one box were taken over by house sparrows. by Fred Stille and Steve Gilbertson. If not for the House Sparrows, we would be using the round hole. (1. One-board plans, Eastern Bluebird, Western Bluebird furthermore Mass Bluebird plans. 99 USD Regular price Sale price $59. Ultimate Bluebird House. 25"W x 8"D x 10. Use a spade bit, hole saw, or adjustable size hole bit with your drill to create the hole. Everything you need toward have success from bluebird hauser! Does PDF plans, DIY video tutorials & the BEST pre-made null boxes. TB-1 is from 1x12 cedar/pine, table saw required. Modern BirdhouseStep 8. only 4 inches/side available Eastern Bluebirds. 1, May 19, 2015Page 1 of 1 Latch screw (or nail) Note: if using nail, drill hole down at angle as shown Pivot screws (each side) Side Side Back Front Roof Inner Roof Floor For 2 i1/2" screw into Floor For 2 1/2" screw into Inner Roof 3" 8. The Gilwood represented one of the most radical changes in bluebird nestbox design since manmade nesting structures were first erected for Eastern Bluebirds in the 1930s. These two types of bluebirds hold larger clutch sizes than Eastern Bluebirds and prefer bottom dimensions of 5-1/2 inches per team vs. Get you need to having past with bluebird houses! Includes PDF plans, DIY see tutorials & the BEST pre-made nest boxes. Assemble as shown (you can also use nails instead of screws). 43) Modern Cardinal Birdhouse Plan. Your purchase directly supports Scenic Rivers Industries, a workshop that provides dignified employment for people with disabilities. 5"L x 5. Give Bluebird House A Superior Look By Painting It. Attract bluebirds and other feathered friends with our larger Backyard Bluebird House. House sparrow problems, more. 5"L. Everything you need to have success with bluebird houses! Includes PDF plans, DIY see tutorials & the BEST pre-made nest boxes. Cut the entry hole by drilling two overlapping holes with a 1-3/8- in. House;. And note that on is no 100% house sparrow proof bird house. Good style for a nestcam. How to Sparrow-Proof a Bluebird House. A two-hole box is not technically a HOSP-resistant box. Liberate bluebird house plans with video instruction. We also had some success by tying reflective mylar tape to the poles of the round hole boxes after the brood hatched and that seemed to keep the House Sparrows away. Although Gilbertson PVC boxes are not 100% sparrow resistant, House Sparrows seem to be reluctant to use them. The best predator guard for a bluebird house or nest box that is commercially available is a stovepipe baffle at least 8 by 24 inches. The distance of the floor from the bottom of the entrance hole in a standard bluebird box is typically 5 to 6 inches. Xbox Birdhouse Plan PDF (Nestboxbuilder. Dried lawn clippings work great for nest replacement. Even if you aren't a birding enthusiast, you will quickly recognize this smallish bird (about 6 inches from head to tip of. Bluebirders often place tree swallow birdhouses within groups of bluebird houses because they protect their territory from sparrows, grackles and other intruders, yet are good neighbors to bluebirds. Building a birdhouse for House Sparrows is one of the most uncomplicated and most enjoyable activities. Depth of the compartment is 6-¾" width is 4". 5″ hole 6″ off the floor. Erva Bluebird Feeder. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. Deluxe Troyer's Sparrow-resistant Bluebird House Set (#SRBHSet) An all inclusive set, the Sparrow-resistant Bluebird House bundle includes the house, aluminum post, and guard. 2. Use wood rough-cut on both sides so that birds can grip both interior and exterior surfaces. 25"L x 1. Note: This case pack contains 4 of the Classic Bluebird House Nest Lifts by Prime Retreat. $84. Close this search boxed. Measure and Cut Bluebird House Door. House sparrow problems, more. Made in the USA! Sparrow-Resistant Western Bluebird House Dimensions: 8. Family Gifts for all age groups. It’s no different for Bluebirds. There are several ways to discourage them from using nest boxes, ranging from boxes specifically designed to dissuade sparrows to traps to eliminate them. Dimensions: 5. Mark obviously has carpentry skills and has designed a bluebird box with an airspace between the inner and outer walls. Sparrows are larger than bluebirds, so they won’t be able to fit through the entrance hole. This spooker is readily mounted on any style box. BWHQ Recommendation; Queries; Bluebird Residences: The Definitive Guide (7 FREE Plans!) So you want a blackbird house is your backyard?For more information on the best bluebird house on the market, go to our bluebird house page. The bottom should be recessed ¼ of an inch. 12 Month Prepaid Bird Watching Subscription – 1 patch a month. Create a Green Roof Birdhouse. Although no nestbox suitable for bluebirds is sparrow-proof, some believe that House Sparrows are often comparatively more reluctant to use Gilbertson PVC boxes as well as other nestboxes that have a small interior volume. 75"W x 10"H. House Sparrows are vicious competitors. for mountain bluebirds), then use a rasp to even out the edges. These “people” I describe represent the English House Sparrow, a. Courtesy odell/birds & blooms an eastern bluebird chases away a house sparrow. Basic Bluebird Nest Box. Troyer's Quality Purple Martin Gourds, Gourd Racks, Bluebird Houses and. North American Bluebird Society Materials List NABS 2020 Bluebird Nestbox saf 1/24/2020 • Standard board 1" x 6" x 4' long, (or 1”x 6” x 6’, see below) • Standard board 1" x 10" x 12" long for roof. But Linda Violett of California has found that somehow Western bluebirds seem. Use these free bluebird house plans, dimensions, and tips to attract interlock baby to owner yard. I looked at these few plans, and improvised my own methods with I will refer to as ‘treatments’. Sparrow-Resistant Eastern Bluebird House Regular price $59. At least, this keeps the sparrow population from increasing. Close get search box. Opening: 4"L x 0. Xbox Bluebird Nestbox Drawn by: Fred Stille, Sr. See Bird House Hole Size if you want to attract a specific bird. Another simple way to reduce the number of House Sparrows and European Starlings around your property is to avoid feeding them. Use wood rough-cut on both sides so that birds can grip both interior and exterior surfaces. Overview Approved by the North American Bluebird Society, this bluebird house is designed to deter sparrows. Look for other clues such as missing or pierced eggs, and pecked or dead nestlings lying under the box. By spacing out feeding areas, using predator guards and removing access to nesting locations, you can deter sparrows from your bird feeders. Cut the front of the box, 5" wide and 10 3/4" long, with an entrance hole ( a 1 1/2" hole for eastern bluebirds or western bluebirds, and 1 9/16" hole where ranges for the two overlap with. 5”x4. Steps: 1. Add to cart Sold. House sparrow problems, more. Features two wooden dowel perches on either side of the entrance to provide your bluebirds with a predator lookout. Gilbertson PVC Box. Dimensions: 4"L x 4. House Sparrow. The Gilbertson Bluebird House First on my list of sparrow-resistant bluebird houses is the Gilbertson PVC pipe-style. These DIY and FREE aviary dates produce fun projects. I'd be interested in your comments. Free maps at Construct101. Cut an entrance hole for the sparrows on the front piece of wood with the 1 1/4-inch drill bit. To keep starlings out of a bird house, the hole must be 1. 25 $ 72. Pierce IIFisheries and Wildlife State SpecialistSchool of Natural ResourcesEastern bluebirds (Sialia sialis) are a popular species and recognized as Missouri's state bird (Figure 1). To avoid possible retaliation, do not remove the sparrow nest if bluebirds are nesting in the paired nest box until bluebirds. Mounting: place inside existing bluebird houses. Featured. House Sparrows are vicious competitors. There are several ways to discourage them from using nest boxes, ranging from boxes specifically designed to dissuade sparrows to traps to eliminate them. Made in the USA. With sheltered boxes like this, a flock is more likely to move in this time of year. 2. Peterson bluebird house assembly and disassembly animation. Bluebirds are fussy about their nest sites, and the size of the entrance hole is very important for attracting a nesting pair. net. If PVC boxes are paired with a wooden box, House Sparrows tend to choose the wooden box. Bluebirds, chickadees, titmice, downy woodpeckers, and nuthatches can fit through a 1-1/2" diameter entrance, but this hole is too small for the larger sparrows and starlings to enter. The Car/ Little Bluebird Box Venting on both sides and across front Sloped roof to shed rain Large overhanging roof to shade box Full swing down opening side for ease of monitoring and clean out Screw fastener on side panel for secure closure Seven interior grooves for fledgling exit ladder Four corner floor drams Vent View with door open 113. The vent holes on the side panels should be 3/4″ in diameter. 2. Boxes should be provided with drainage and ventilation spaces. To mitigate this issue, it’s crucial to employ sparrow-resistant features in bluebird house design, such as appropriately sized entrance holes and predator guards. 1-1/2" diameter slot entrance perfect for Eastern Bluebirds. Some studies have shown that bluebirds prefer a slot entrance to the standard circular hole entrance and sparrows prefer the opposite. Ideally, the entrance hole should face away from prevailing winds. 25"W x 8"D x 10. Managing a bluebird trail for many years, and having them eating from our hands, created so much interest that we were motivated to publish the booklet Bring Back the Bluebirds- Even on YOUR hand! Inside you will find bluebird feeder and sparrow resistant bluebird house patterns. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. Add to cart. More specifically, 5′ from the ground to the bottom of the birdhouse. It has a square door to one side of the trap which makes removing birds somewhat more difficult than the round, centered door on the DRST. for mountain bluebirds), then use a rasp to even out the edges. Discourage sparrows from overtaking your bluebird trail thanks to this Sparrow-Resistant Eastern Bluebird House. Eliminate Garden Pests By Building A Bluebird House. However, chickadees, nuthatches, warblers, woodpeckers, and wrens will also gladly make this their home. Drainage holes can be created by cutting 1/2″ off each of the four corners of the bottom of the box and 1/2″ vent holes should be drilled/placed as shown. NABS Fact Sheets & Plans. 99. If you see evidence of house sparrows, discard their materials. Another one-board bluebird house plan is here (pdf). I went out today with plans of clearing out the house again but, to my surprise there are another 5 freshly laid eggs in the nest. Free Bluebird Your Plans for Eastern, Western & Berg Doves. These all use exclusively right angle. 99. Durable tan and green recycled plastic. Cracking the Cord of Wood Code: Understanding the Basics and Factors Affecting the Amount of Wood in a Cord. To this day (5-5-15) the trail is completely sparrow free!” ~Dean Rust Sparrow Resistant Bluebird House Plans-Pleasant for you to my personal weblog, in this particular occasion I am going to provide you with regarding sparrow resistant bluebird house plans. Create a sparrow resistant Bluebird box by adding a skylight. Avoid using bluebird houses with larger entrance holes or slot entrances. Clean-out door provides easy access for cleaning. • For Eastern Bluebirds, you can use a 1½ inch round hole, a 1⅜ x 2¼ inch vertical oval hole, or 1⅛ inch horizontal slot entrance. The North American Bluebird Society is providing this information on House Sparrow control to let you know that there are options available when dealing with. Download Plans: Features: The entrance hole size is 1-½". PDF Guides for Bluebird House Plans (5 total) #1. Bluebird houses that cost around $24 are basic, wooden nest boxes without too many extra features. F30 Nestbox Plan PDF – Ideal for Western/Mountain Bluebirds (Nestboxbuilder. Latest Posts; ID Guides; BWHQ Recommends; Quizzes; Blackbird Houses: The Final Guide (7 FREE Plans!) So you like one bluebird house at your backyard?Bluebirds, chickadees, wrens, finches, nuthatches, and titmice seek out abandoned woodpecker holes and tree cavities for nesting sites. Explore. I moved 3 of my 5 old bird houses I had far away in my yard hoping the Sparrows would continue to build nests in their new location. This shelter, based on thorough research from the University of Kentucky, caters specifically to bluebirds and deters sparrows from nesting. This will allow the mylar strips to blow. Here are four tips to deter sparrows: 1. Each box has a 2 1/2 inch diameter skylight covered with clear plexiglass. Skip until content. 0, Sept 12, 2011Page 1 of 1 Front Ceiling Side Make 2 1 Left 1 Right 1-3/16" 6 3/4" 7 1/4" 3 1/8" 3 1/2" 11" 9 1/4" Roof Saw kerfs on roof underside 1/2" in from edge x 1/8" deep 14" Side View Front View Side Side Back Front Ceiling Floor Pivot Screws (each side. • Western and Mountain Bluebirds prefer a 1 9/16 inch round opening or 1 3/16 inch slot entrance. As a general rule, it is OK to open a bluebird house for monitoring. The plan above specifies a 1. Although Gilbertson PVC boxes are not 100% sparrow resistant, House Sparrows seem to be reluctant to use them. General bluebird nest box dimensions should be: at least 9”x4. The 22-degree bevel sets the angle of the slope for the slant front birdhouse, and it will match the angled cut for the side pieces (C). The tree and violet green swallow birdhouse has a 5″ by 5″ floor, an 8″ floor to ceiling height and a. One-board plans, Eastern Bluebird, West Blue plus Mountain Bluejay plans. This is my favorite plan for a bluebird nest box. Found this (thanks Kathy Felty Clark)! Do not know if there are plans to build them yourself, though. Opening: 3. The walls are barely more than 1/16 inch thick and will be slightly less heat resistant than the heavier walls of Schedule 40 PVC pipe. Eastern pink hauser can also have an 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the apex front of the box 13 FREE Birdhouse. Made in the USA. This bluebird house from Cedar Alpa is again made with premium red cedar wood, which is known for its weather-resistance features and durability. Eastern bluebird houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole alternatively a 1 1/8 inch horizontal sparrow-resistant slot entrance at the pinnacle front in the box Three Designed Birdhouse. ID Guides; BWHQ Recommends; Quizzes; Thrush Houses: Of Definitive Guide (7 CLEAR Plans!) So you want a bluebird house in your backyard?. com) The F30 bluebird nestbox has a large floor space, totaling 30. House Sparrows will readily use them in the absence of bluebird competition. Boxes should be provided with drainage and ventilation spaces. Attract bluebirds or Tree Swallows to eat your insects. 969 cm) entrance hole in the front piece. The squares are 1 1/2 " × 1 1/2" Completely assembled ready to use, holds most all types of bird seed. Monitor your nest boxes regularly to remove house sparrow nests. This Gilwood slot box is a simple yet popular bluebird house. Photo by stevesunusual is licensed under CC BY-NC-ND 2. Bluebird babies or adults inside the box. . Prevent Heat Stress. House Sparrow Nest in Bluebird Nest Box. 17) Wren House Plans. Price: $189. Home;. Dimensions: 9. Audubon's collection of bird feeders, houses, bird baths, and accessories have been reviewed by our science team and field-tested for quality assurance. Search. These include Tree & Violet-green Swallows, bluebirds, chickadees, wrens, nuthatches, and possibly titmice. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. 5″ entrance hole is the optimum diameter for bluebirds and tree swallows. TB-1A is 1x6, 1x8 and 1x10 lumber with largest floor area (32 square inches), for species that need more space. Aug 08, 2013 #1. . Mount against any flat surface. Peterson bluebird house plans created date: Ad find deals on sparrow resistant bluebird house in backyard birding on amazon. Eastern bluebird houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front of the box You can then follow our general information and tips on making bird houses regarding placement, wood type and thickness, ventilation, predator prevention and more. Free bluebird house plans with video instruction. Facebook-f Pinterest-p Youtube. Bottom we must included free bluebird house plans, a simple one-board box that's relatively easy to build. Dimensions: This Bluebird house mounts on a 1/2" hollow ground pole. Avoid Feeding. 75"H each. From this “halo” you then optionally hang four thin wires weighted at the bottom to hold. 95 Sold Out. House sparrows will kill bluebirds and destroy eggs and young. 1k) $62. Press two pushpins securely into the front of the nest box roof (about 1 3/4″ apart). Consider using a PVC-style bluebird house, like the “Gilbertson” nest box. A "bluebird" house placed next to a shrubby thicket likely be of interest to a Car- olina wren. Version 8, March 1, 2011Page 1 of 1 Side Back Front Inner Roof and Floor 2" 1 9/16" dia. Plans for a simple. 22. Close this explore field. containing millet and cracked corn. That is the short and sweet answer for where to place a. #4. It is the only bluebird house that comes with vent plugs to block out blackflies when they become a problem. Made in the USA. Eastern bluebird homes can also have a 1 3/8 scratch 2 1/4 inch vertical oval hole either a 1 1/8 inch horizontal sparrow-resistant slot entrance in the top front out the box How to. k. Skip to content. How to Build a Bluebird House. Large roof overhang and floor size. One-board schemes, Eastern Bluebird, Western Bluebird or Mountain Bluebird plans. Sand all edges prior to assembly. You know adenine birdhouse is well-designed. House Sparrow proof. Watch. Available bluebird house plans in video instruction. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. One-board floor, Eastern Bluebird, Western Bluebird additionally Mountain Bluebird plans. Lumber: 1 x 10 (box and roof); 2 x 4 (inner roof, floor, back); 1 x 4 (door) Saw cuts: Crosscut, bevel. 6 Owl House Plans 9 Owl Species. Free bluebird house plans with video instruction. Price: $69. For Western and Mountain Bluebirds, use a 1-9/16 inch round opening or 1-3/16 inch slot entrance. 25"H Slot Opening for Western Bluebirds; Weight: 4 lbs. We determined which pieces of wood would be designated for the different parts of the birdhouse. These free bluebird house plans can help any birder. The common house sparrow can be invasive and harmful to native birds. The bluebird should have a house measuring about 5" in length and width, inside measurements, and 8" or more in depth. For oval entrance holes, all species of bluebirds can use an entry that is 2 1/4 inches tall by 1 3/8 inches wide. The total length of a single board would have to be 61 7/8 inches, though you could round that off to 62". An option is to move bluebird boxes away from buildings and bird feeders. House Sparrows are vicious competitors. Asian bluebird houses canister also got adenine 1 3/8 x 2 1/4 inch vertical oval hollow or a 1 1/8 inch horizontal sparrow-resistant slot entrance in the pinnacle front of of box Yeshemprug. Eastern bluebird houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front of. Free bluebird house plans multiple designs bird house. 2. Conclusion. Eastern bluebird houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant. Brood size was 4 birds per box last year. Here I share easy, humane, and natural ways to discourage them from the yard. 625"D x 10"H. Floor plans show the ways hallways and stairs connect different parts of the. In this video, I build a bluebird house with slot entry. Therefore, just because a box is called a "bluebird" housecontaining millet and cracked corn. If you only want to provide houses for nesting, putting them up in late winter or very early spring will ensure they are available for even the earliest nesting species. Build a Pitched Roof Bluebird House. Since then, I learned of a trick from a friend that deters the house sparrows and allows the bluebirds. 44) Hanging DIY Birdhouse Plan. 2 1/8"2 1/8" CL Roof 3/4. . Baby don’t require one, and it will all encourage other birds, that as House Sparrows. Keep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow. jill keepes Apr 30, 2023. Lodge sparrow problems, more. Properly sized entrance holes and predator guards are essential for bluebird house construction. $120. Bluebirds will usually move into the HOSP-resistant box. This birdhouse for bluebirds help them defend their nest better. In 2014 we had two nesting bluebird couples. In 2014 we had two nesting bluebird couples. Always opt for pole- or post-mounted birdhouses as opposed to mounting on a tree. Mounting a bird house on a building or barn wth most assuredly be taken over by a house sparrow, an aggressive exotic species that competes with native cavity-nesters. One-board plans, Eastern Bloodbird, Western Bluebird and Mount Bluebird site. These free bluebird house plans can help any birder build just the right size, shape, and style of house to appeal to bluebirds and attract nesting bluebird pairs. Knowing when to put out birdhouses is essential for birders to attract nesting birds to their yard or garden. Bluebirds can be found throughout the state, and are most common in rural areas. Perfect, Our Favorite Dame Watching Binoculars, Squirrel-Proof Feeder & Hummingbird Feed Get Our Reviews:Also the nest tray takes cubic inches away from the cavity which also discourages sparrows. Mounting: post or. If you cannot deal with house sparrows, do not install bluebird boxes. Opening: 4"L x 1. Free Bluebird House Plans by Eastern, Western & Mountain Bluebirds. Male sparrows can not block entrance and trap the female Bluebird during incubation. Add to cart. Place away from dense cover (shrubs, thickets) and woods. that easy). 4 3/4" x 4 3/4" floor. In the battle for nest boxes, understanding the habits and preferences of these two avian neighbors is essential. Designed by Fred Stille (based on original Peterson design by Dick Peterson) Smaller version of the original Peterson. I don’t believe that one can make The pipe detaches from the wooden roof to monitor bluebird nests quickly and easily.