5”x4. It also deters predators from reaching in and attacking the nest. Bluebirds prefer a house that has an entry hole of 1 1/2 inches for eastern and western species and 1 9/16 inches wherever mountain bluebirds may be. Home;. Made in the USA. Regular Monitoring— Regular nest box monitoring is the most effective way to control House Sparrows. This model includes a stay-clear, crack-resistant viewing window to allow for nest viewing. 2. Everything you need to have success in bird houses! Includes PDF plans, DIY video tutorials & the OPTIMAL pre-made nest boxes. Many people are hesitant to exterminate a house sparrow or even remove a house sparrow nest. $84. all about birds cornell. Search. As a general rule, you should place your bluebird house in an open, sunny area where there is plenty of short grass where bluebirds can catch insects. This spring I noticed the bluebirds entering the box and now it is in use by the bluebirds. Sparrow resistant Bluebird box Dean Rust 862 subscribers 122K views 10. Excellent Bluebird house! Constructed from Western Red Cedar. Attract bluebirds, then watch your bluebirds fledge. Drill a hole on the hinged side 2 inches up from the bottom and 1/2 inch in from the side. A ready-made, weather-resistant Sparrow Spooker is now commercially available from Sparrowtraps. 25"H. Advanced. COV-10044. Features slotted entrance to protect nestlings from House Sparrows. People who successfully raise bluebirds (and other native secondary cavity nesters) in House Sparrow territory generally trap and euthanize House Sparrows that invade nestboxes, but this may be too late to save young or adult bluebirds from House Sparrow attack. Make those cuts (first cut should be on a 15-degree angle, the rest will be straight cuts). Layout and the drill the 1-1/2" entrance hole in the front (A). The next step to build a bluebird house is to cut part D from a 1×4 so the end is 45 degrees, and then reset your saw to cut the piece to final length. This reminds me of an old box designed by Vince Bauldry - the Bauldry open top - but this one won't let rain in. Overall box size: 8" high x 4-½" wide. 5"L x 5. House Sparrow Nest in Bluebird Nest Box. This bluebird house from Cedar Alpa is again made with premium red cedar wood, which is known for its weather-resistance features and durability. Etsy. For all three species of bluebirds, a 1 9/16 inch round hole is acceptable. The house sparrow, Passer domesticus, is one of the most familiar, widespread birds in the world. One-board plans, Eastern Bluebird, Western Bluebird furthermore Mass Bluebird plans. ), you risk HOSP attacks and are enabling HOSP populations to explode. Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. The Sparrow Resistant PVC. Construction: stainless steel. House sparrow problems, more. #4. 3. Skip to content. Select you need to have success with bluebird houses! Includes PDF plans, DIY video tutorials & the BEST pre-made nest fields. 25"H Slot Opening for Western Bluebirds; Weight: 4 lbs. Wrens only need a 1-1/4" diameter entrance. easy to monitor, real resistant to tempestuous weather and predators. Price: $159. Create a Green Roof Birdhouse. Measure down the front panel 1 ¼ inch and drill two pilot holes. Lodge sparrow problems, more. LEFLEUR BIRDBATH or PLANTER (4 Color Options): Solid Stone Durable Container. Use the attached, back hanger to place the home against a post or wall, or pole mount it with a mounting bracket (not included). All plans include diagrams and instructions. Step 1: The Plan. Easy open for monitoring and cleaning. This nest box is made from white 4-inch diameter PVC sewer and drain (S&D) pipe. Another one-board bluebird house plan is here (pdf). The floor should be between 4 1/2 to 5 1/2 inches square and the floor should be 5 to 8 inches below the entry hole. Instead of a drill hole, this design has an open-top slot entrance, safer for birds to exit in case of an intruding predator. Sealed for Outdoor Use & Holds Water. Facebook-f Pinterest-p Youtube. 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. House sparrows chase bluebirds away, crush their eggs, kill nestlings and also kill adult bluebirds. 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. 9. Free bluebird house plans with video instruction. Watch. But more importantly, it is a paintable birdhouse for the kids that allows them to color and make them feel the ownership of the birdhouse. Making Nest Boxes Sparrow Resistant (PDF) (by Lee Pauser) will help you keep sparrows out of your boxes. Building a birdhouse for House Sparrows is one of the most uncomplicated and most enjoyable activities. With sheltered boxes like this, a flock is more likely to move in this time of year. Build a Bluebird Box. Sparrows like to nest in trees and shrubs, so if you make it. Bluebird Houses: The Clear Guide (7 LOOSE Plans!) So you want ampere bluebird your to your backyards? Well-being, you have come to an right place. 2-3/4 x 1-3/8 inch oval entry hole. only 4 inches/side available Eastern Bluebirds. Follow these guidelines: Entrance Hole Size: Bluebirds prefer a 1. Bird House Plans. Note that I have changed the design to open the door from the top. 125"L x 5. Build a Pitched Roof Bluebird House. 125"L x 5. Sparrows are larger than bluebirds, so they won’t be able to fit through the entrance hole. Two venting options. Search. Made in the USA, available exclusively at Duncraft. Materials: This house has a western red cedar roof. Each box has a 2 1/2 inch diameter skylight covered with clear plexiglass. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plots. As if that is not enough, male sparrows will mate with several females. 2. A horizontal slotted entrance at the top of this bluebird house allows light to enter, deterring sparrows which prefer darker areas. Respective birds will appreciate some holes drilled into the top to help with airflow also cooling. Bring Back The Bluebirds - Even on Your Hand. In this article, you’ll learn how to build or buy the right Sparrow bird house. Depth of the compartment is 6-¾" width is 4". Sparrows can be aggressive and persistent, which means they may remove bluebird eggs or chicks and take over the nesting box. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. Good style for a nestcam. for mountain bluebirds), then use a rasp to even out the edges. you will need to monitor the box and use the below tips to not attract starlings to your backyard. Wrens will use holes that. . Everything to need to take success with bluebird home! Includes PDF plans, DIY video how-to & the BEST pre-made nest boxes. Mounting: Post. Choosing a Bluebird House to Build The 10 DIY Bluebird House Plans. Tip: we use a 16 x 16 plexiglass…. The tube shape paired with the coloring of this birdhouse represents the look of a birch tree. Made with rot-resistant premium cedar and rust-free stainless-steel hardware. If House Wrens are likely to be a problem, be sure the box is mounted at least 50–200 feet away from a wooded orThis repeating elevator sparrow trap was about $70 + $10 shipping. Your purchase directly supports Scenic Rivers Industries, a workshop that provides dignified employment for people with disabilities. The bluebirds seem to like the design, and it is easy to monitor and clean out. $83. Bluebird Residence Plans. 2 1/8"2 1/8" CL Roof 3/4. 19) Andy’s Free Bird House Plans. Quality western red cedar construction. ". Home;. Baffles placed above and below the house can help deter predators such as raccoons, rats, and snakes, and the birdhouse itself should be designed to be safe. Cut the 10" x 4" front door section and drill a 1-1/2" entry hole, centered 7" above the bottom of the door. Another one-board blackbird my plan is here (pdf). Mount the sparrow spooker to the back of the bluebird house so that there is a distance of about 8" between the roof line and the top of the device. 00. The plans can help you not make mistakes or miss essential details while building. Add to cart. Cut the entry hole by drilling two overlapping holes with a 1-3/8- in. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. 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. There are toe holds under the entrance inside. Free bluebird house plans with view introduction. TB-1B is 1x6 and 1x10 lumber. 5″ entrance hole is the optimum diameter for bluebirds and tree swallows. 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). Free bluebird house plans with film instruction. This will allow the mylar strips to blow. Eastern Bluebird. Tree & Violet Green Swallow Birdhouse. Version 1. Ravenox Sparrow Resistant PVC Bluebird House. Water: All birds need fresh water for drinking and bathing, and a clean water source can make a yard even more. If you are trying to attract bluebirds in an area where you suspect HouseGilbertson Bluebird House (Best “Sparrow-resistant” Bluebird House) Another popular style of nest box is the Gilbertson Bluebird House , which is made of thin PVC pipe. Free Bluebird House Plans. The bluebird should have a house measuring about 5" in length and width, inside measurements, and 8" or more in depth. The Amish Gilbertson Bluebird House has a round birch-like log bottom and a strong squared top made of eco friendly poly (recycled plastic). Features: Made from Western Red Cedar for light weight and durability. It’s no different for Bluebirds. Add to cart. Use wood rough-cut on both sides so that birds can grip both interior and exterior surfaces. House sparrows, also called English. I looked at these few plans, and improvised my own methods with I will refer to as ‘treatments’. House sparrow problems, more. Features slotted entrance to deter House Sparrows. Dimensions: 5. Best Nest Box: My all-time favorite nest box for bluebirds is the Nature’s Way model CWH4. Sparrows like to nest in trees and shrubs, so if you make it. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. F30 Nestbox Plan PDF – Ideal for Western/Mountain Bluebirds (Nestboxbuilder. Sparrow-Resistant Eastern Bluebird House Regular price $59. boxes as well as other nestboxes that have a small interior volume. House Sparrows can easily produce three to five broods per season. Everything you need go have success is bluebird houses! Includes PDF plans, DIY movie tutorials & the BEST pre-made nest boxes. Assemble as shown (you can also use nails instead of screws). The dimensions of the floors in traditional bluebird boxes are typically 4-by-5 inches. Homepage;. These two types of bluebirds have. With three to five eggs in the average clutch, a single pair of house sparrows can quickly become a flock of 15 to 25 birds in one season, at a single nesting site. Everything you must until having success with bluebird houses! Includes PDF plans, DIY videos tutorials & the BEST pre-made nest boxes. NABS (North American Bluebird Society) Approved. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. Knowing when to put out birdhouses is essential for birders to attract nesting birds to their yard or garden. 95 Add to Cart. Eastern bluebird houses can also take a 1 3/8 x 2 1/4 inch vertical oval drilling or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the tops front of the box Step-by-step. Facebook-f Pinterest-p Youtube. One-board plans, Eastern Bluebird, Western Bluebird and Hill Thrush plans. This set of 3 homes and 3 poles helps you establish suitable housing for bluebirds, while deterring sparrows from nesting. We focus mostly on eastern bluebird house plans, but you can use the same plans for western bluebirds, and to use them for mountain bluebirds, make the entrance hole slightly larger, as we recommended in the last section. 75"W x 10"H; Opening: 4"L x 1. Close get search box. Mounting: post or. 25"H; Weight: 4 lbs. 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. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. Keep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow. Category: Home & Garden, Bird Feeders | Bird Houses, Backyard & Nature Products, Gift Ideas. 1 Helpful. Version 8, March 1, 2011Page 1 of 1 Side Back Front Inner Roof and Floor 2" 1 9/16" dia. NATURAL WOODEN BIRD HOUSE: Crafted from premium cedar,wooden bird house is great sturdy, Novel in shape. 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 and top front of one box 38 Free. One-board plans, Eastern Bluebird, Occidental Bluebird also Mountain Bird plans. Selecting a Location. 11 DIY Standing Desks. 22. Search. Close this search box. Home; Latest Stations; ID Guides; BWHQ Recommends;. Fortunately, house sparrows seem to prefer to nest in boxes with round holes rather than boxes with slots or oval entrance holes. 3 “sparrow-resistant” nest box designs (the pros and cons of each) #1. Make sure the entrance hole is no larger than 1 1/2″ in diameter to prevent starlings. 00 $ 22. THE SPARROW ISSUE: The sloped roof and slot entrance can be more challenging for competitor birds to get into. Press two pushpins securely into the front of the nest box roof (about 1 3/4″ apart). Close this search box. With these tips and tricks to sparrow-proof. These include Tree & Violet-green Swallows, bluebirds, chickadees, wrens, nuthatches, and possibly titmice. Facebook-f Pinterest-p Youtube. Home;. 5" from hole to recessed floor. Discourage sparrows from overtaking your bluebird trail thanks to this Sparrow-Resistant Eastern Bluebird House. Mount the sparrow spooker to the back of the bluebird house so that there is a distance of about 8" between the roof line and the top of the device. The most common problems are the House Sparrow, Raccoons, and Rat snakes. Search. Another one-board bluebird house plan is here (pdf). FREE shipping and the BEST customer service!How Toward Building Bluebird House Plans Video. Bluebird Inspect Chick House Before Making adenine Final Decided - "I likes the open floor plan. 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. Peterson Bluebird House Plan PDF(Nestboxbuilder. Bird House Plans. Made in the USA. The plastic Bluebird House weighs but a pound, comes with a metal hanger that makes it very easy to install, features a robust rain guard, an interior ladder for chicks and adults, and is the driest, snuggest. The best “sparrow-resistant” bluebird house (My recommendation) For most cases, my top recommendation for sparrow-resistant bluebird houses is the Gilbertson PVC pipe-style nest box This nest box has been shown over and over again to deter house sparrows and be attractive to bluebirds, specifically eastern bluebirds. There are guidelines provided and you can just follow these to be able to build a beautiful and effective Eastern Bluebird House. Search. Erva Bluebird Feeder. 2. 5"L. Skip till web. Bluebirds, cardinals, martins, etc. Small feeding cup. House sparrows chase bluebirds away, crush their eggs, kill nestlings and also kill adult bluebirds. Download nest box design. In this video, I build a bluebird house with slot entry. Make a Bluebird Trail. Steps: 1. Therefore, just because a box is called a "bluebird" house BirdInformer BESTSELLER # 2. We determined which pieces of wood would be designated for the different parts of the birdhouse. Drill a 1 1/2 inch diameter hole to serve as an entrance. you will need to monitor the box and use the below tips to not attract starlings to your backyard. Sparrow Spooker. 25"H Dimensions: 8. Winter Bird House Assembly. SUQEFAN 11" H Hanging Wood Blue Bird House for Outside Clearance with Metal Guard，Birdhouses for Outdoor Finch Bluebird Cardinals，Gifts for Bird Lovers,Garden Decorations，Gardening Gifts. 5-inch entrance hole. Once the bluebird babies are 7 to 10 days old you can change the nest to keep it parasite free. Features slotted entrance at the top to discourage House Sparrows. Find more free bird houses plans or discover more birdhouses and bird feeders. Use wood scraps and bluebird box plans to build a bird house in a lean-to shed design. 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). 5-inch hole for eastern and 1-9/16-inch hole for western and mountain bluebirds, the latter working universally for all 3 species. A two-hole box is not technically a HOSP-resistant box. One-board plan, Eastern Dark, Western Bluebird and Mountain Bluebird plans. Made from Eastern white pine. 375"L x 1. Two side pieces, 6 x 9 inches, just like the front, except for the. Create a Green Roof Birdhouse. Opening: 3. House sparrows have a terrible reputation for killing other species of birds in order to use their nest sites. Premium Two-Sided Observation Bluebird House Premium Two-Sided Observation Bluebird House Regular price $62. Latest Posts; ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Definitive Guide (7 FREE Plans!). Facebook-f Pinterest-p Youtube. Bluebird house planning, plans incorporate a free PDF download, material list, drawings, the instructions. General information on how to attract nesting bluebirds, including distinguishing nests and eggs of other cavity nesters, heat, dealing with house sparrows, data on bluebird trail. Proudly made in the USA! Dimensions: 5-1/4" x 6-5/8" x 10"; 1. Price: $189. Make those cuts (first cut should be on a 15-degree angle, the rest will be straight cuts). Overview Approved by the North American Bluebird Society, this bluebird house is designed to deter sparrows. Go To Homepage. Erva Bluebird Feeder. 00. One-board floor, Eastern Bluebird, Occident Bluebird and Mountain Bluebird plans. Duncraft Sparrow-Resistant Bird House. View Details. 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. Eastern bluebird houses can including have a 1 3/8 efface 2 1/4 inch vertical ovate hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the above front of the box . If you cannot deal with house sparrows, do not install bluebird boxes. The holes should be positioned in the top left and right corners. Liberate bluebird house plans with video instruction. 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. Step 2: Creating the Entrance Hole and Predator Guard. Home; Latest Posts; ID Guides; BWHQ Advocates; Quizzes; Menu. Facebook-f Pinterest-p Youtube. How to Build a Bluebird House. only 4 inches/side available Eastern Bluebirds. 875"L x 1. 17) Wren House Plans. Whenever possible, place the house in a clearing with tall grasses or shrubbery 8-12 feet away. Black oil sunflower seeds are a great overall choice that many birdhouse residents will appreciate, or birders can provide specialized foods to attract certain birds, such as suet for woodpeckers or mealworms for bluebirds. 6. Predator Guard Designs. Nestbox skylight. One-board schemes, Eastern Bluebird, Western Bluebird or Mountain Bluebird plans. 42) CBRP Bluebirds House Plan. 5-1/2 x 1-1/8 inch slotted entry hole. 5" or smaller. Gilbertson boxes, Gilwood boxes, and Troyer boxes (just to name a few) have all proven to be attractive to bluebirds and less attractive to. 5. Dimensions: 4"L x 4. One-board map, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. House Sparrow. from basic nest box to bluebird mansion! Vinyl Bluebird House $109. Below are fun, out-of-the box birdhouses that add style to walkways and gardens. Add to cart. Below are our top picks for attracting a variety of birds to your outdoor space year-round; plus you can find our 200+ styles of bird feeders, birdhouses, bird baths and accessories in-stores. For best results do not place house near trees or bushes, placing the house in the open will work best for Bluebirds. (optimum) Alternate: 1 1/2"This is one of the best sites for information on bluebirds additionally nest box plans. Available bluebird house plans equipped video instruction. One-board schedule, Orient Bluebird, Westerly Bluebird the Mountain Thrush schedule. Home; Last Posts; ID Guides; BWHQ Recommends; Quizzes; Bleeding Houses: The Ultimate Orientation (7 FREE Plans!) So you want a bluebird house include own. 5"L x 5. Search. Prevent Heat Stress. Mount the nest box at least five feet off the ground, not too close to buildings, and at least 50 feet away from brushy or wooded areas. Asian bluebird wohnen can also have a 1 3/8 x 2 1/4 inch vertical oval hole button a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front starting the box Peterson Bluebird House Dates. How do you sparrow proof a bluebird house. bluebird houses canned also have a 1 3/8 whatchamacallit 2 1/4 inch vertical ovate hole button a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front of the. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: To Definitive Guide (7 RELEASE Plans!). Wrens only need a 1-1/4" diameter entrance. Made in the USA. Latest Poles; ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Clear Guide (7 RELEASE Plans!)Free bluebird house plans with video instruction. Placing this house in a sparrow-rich environment is not recommended. Bluebirds prefer to nest in open areas with low or sparse ground cover. The front piece should now be attached to the walls and base. One-board plans, Eastern Bloodbird, Western Bluebird and Mount Bluebird site. General bluebird nest box dimensions should be: at least 9”x4. If she living in an specifically hot climate, like the South, here are cooling bluebird house site designed go sketch air by and keep nestlings cool. Step 2: Make an Entrance. 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. Keep boxes away from sheds, outbuildings, barns, and other structures where house sparrows may be nesting or otherwise attracted to. Sep 22, 2019 - This Feeders & Birdhouses item by birdhousesbymark has 20 favorites from Etsy shoppers. Sparrow Spooker set contains (2) horizontal arms with streamers and (2) vertical posts. $10. Managing house sparrows sialis. (optimum) Alternate: 1 1/2"You can set up two boxes, up to twenty feet apart, to allow bluebirds in one and other, non-competing birds, in the other. Note: This case pack contains 4 of the Classic Bluebird House Nest Lifts by Prime Retreat. Unique Birdhouse Plans. Build a Slant Front Style. Starlings can be excluded from nestboxes by using the correct size entrance hole, but they willTo find the right bluebird feeder, consider the following products rated highly by expert birders. Bluebirds usually produce two or three. Skip to topics. Our Amish Recycled Poly Sparrow Resistant Bluebird Nesting Box Package with Pole Kit is sure to help enhance the blue bird population of your outdoor area - providing a beautiful, safe and secure place for bluebirds to enjoy! Simply mount to any fence, post, pole, tree or wall. NESTBOX BAFFLES : A wobbling PVC baffle will deter many climbing mammals, but an 8" metal stovepipe baffle topped with hardware cloth will deter. Birch-like log base. Hole saws were used for the xbox entrance and ventilation holes, as well as the mounting block. Free bluebird house plans with view instruction. House sparrow problems, more. Quantity - +. We determined which pieces of wood would be designated for the different parts of the birdhouse. Designed by Steve Gilbertson of Aitkin MN, the Gilwood has since established itself as a favorite with both Bluebirders and the. 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. 95 Sold Out. for mountain bluebirds), then use a rasp to even out the edges. 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. Below are fun, out-of-the box birdhouses that add style to walkways and gardens. Since monitoring nest boxes once a week can actually improve nesting success for bluebirds, you are encouraged to open your bluebird houses! Additionally, opening boxes in the afternoon bothers bluebirds less than in the morning. 75"W x 10"H. AN simple go build, yet proven bluebird house such is made mostly from one cedar house. Dimensions: This Bluebird house mounts on a 1/2" hollow ground pole. 5"L x 7. Eastern bluebird houses capacity also have a 1 3/8 x 2 1/4 inch vertical oval drill or a 1. 3. Roof is made from Poly-Tuff™ for greater exterior quality. Drill 5/8" vent holes 1" down from the top and 2" in from each side. Download Plans: The entrance hole size is 1-½". Shelter sparrow problems, more. It is the responsibility of every bluebird landlord to ensure that no House Sparrows fledge from their boxes. Sand all edges prior to assembly. To keep starlings out of a bird house, the hole must be 1. • 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. Gilbertson Bluebird House (Best “Sparrow-resistant” Bluebird House) Another popular style of nest box is the Gilbertson Bluebird House , which is made of thin PVC pipe. net. Measure and Cut Bluebird House Door. A.