This Kentucky style, slot entrance bluebird house is designed to thwart sparrows. 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. Managing house sparrows sialis. Instead of a drill hole, this design has an open-top slot entrance, safer for birds to exit in case of an intruding predator. Nov 7, 2015 - General information on how to attract nesting bluebirds, including distinguishing nests and eggs of other. House sparrow problems, more. 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 . 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. No quality bluebird house can compete with. Tree & Violet Green Swallow Birdhouse. Everything you need to have success in bird houses! Includes PDF plans, DIY video tutorials & the OPTIMAL pre-made nest boxes. Either build a predator guard for the house entrance or buy one. 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. Construction: pine. . 9 North American Owls Nest in Boxes. House sparrow problems, more. Free Bluebird Your Plans for Eastern, Western & Berg Doves. Fortunately, house sparrows seem to prefer to nest in boxes with round holes rather than boxes with slots or oval entrance holes. 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. $84. Below are fun, out-of-the box birdhouses that add style to walkways and gardens. These all use exclusively right angle. 00. Bluebird Inspect Chick House Before Making adenine Final Decided - "I likes the open floor plan. Encourage lovely bluebirds to roost in your yard by placing this Gray and Brown Recycled Plastic Sparrow Resistant Bluebird House in it. Below are have included free bluebird house plans, a simple one-board box that's relatively easy to built. by Fred Stille and Steve Gilbertson. Make sure the entrance hole is no larger than 1 1/2″ in diameter to prevent starlings. This house is very attractive to the Bluebird species as well as Wrens, and other small bird species. 5"L x 5. This will allow the mylar strips to blow. 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. Steps: 1. BirdSafe® Bluebird House & Pole with Noel Guard, a . It is made from recycled materials and is built to. It is thought that the shallow depth of the box, combined with the plastic wall material is not like by sparrows. Western & Mountain Bluebird House Plans. Cut a 22-degree bevel across the top of the front section (A). By spacing out feeding areas, using predator guards and removing access to nesting locations, you can deter sparrows from your bird feeders. House sparrows chase bluebirds away, crush their eggs, kill nestlings and also kill adult bluebirds. Avoid Feeding. A minimum of 5′ enables most people to easily monitor and maintain the house. Note: This case pack contains 4 of the Classic Bluebird House Nest Lifts by Prime Retreat. Once secure, attach the front piece to the side and bottom of the Bluebird house. Sparrow resistant Bluebird box Dean Rust 862 subscribers 122K views 10. Prevent Heat Stress. Wait for birds. Bluebirds can be found throughout the state, and are most common in rural areas. Free bluebird house plans with video instruction. 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. Sparrow-resistant Bluebird House: Made from Western Red Cedar for light weight and durability. House sparrow problems, more. Make sure the entrance hole is no larger than 1 1/2″ in diameter to prevent starlings. Eastern Bluebirds fit easily through a 1-1/2" entrance hole. Materials: This house has a western red cedar roof. Building a birdhouse for House Sparrows is one of the most uncomplicated and most enjoyable activities. Russian bluebird houses can also may a 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance during the top front of the box Build an. 5 x 5 x 10 inches. Home; Latest Item; YOUR Guides; BWHQ Recommends;. 2 1/8"2 1/8" CL Roof 3/4. See we have in free bluebird house plans, a simple one-board box that's relatively easy to build. 5 inches wide. House sparrow problems, more. Attract bluebirds or Tree Swallows to eat your insects. Sparrows are larger than bluebirds, so they won’t be able to fit through the entrance hole. In this video, I build a bluebird house with slot entry. How to Sparrow-Proof a Bluebird House. Bluebird houses made of PVC material have a shallow depth that sparrows dislike. Cut a 4 by 8 1/2 inch plank of wood for each side of the house. Sparrow Spooker set contains (2) horizontal arms with streamers and (2) vertical posts. It is better to have no nestbox than to have one that fledges House Sparrows. #nativebirds #housesparrow #invasive #bluebirds #helpnatives. Add to cart Sold. Alternative Bluebird Nest Box. 7. 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. 20) Andy’s Bluebird House Plan. Free bluebird house plans multiple designs bird house. View Details. 1. Use a bluebird house with a small entrance hole. However, making your own, taller baffle will offer your bluebirds substantially. See Bird House Hole Size if you want to attract a specific bird. 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. 18) Birdhouse Designs. Always opt for pole- or post-mounted birdhouses as opposed to mounting on a tree. However, there is still no such thing as a “predator-proof nest box” because it is hard to control for predators such as bears and House Sparrows, which are not so easily deterred. 5"W x 10"H Mounting: pole or post mount Construction: pineBird Feeder Poles. Duncraft Sparrow-Resistant Bird House. 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. Family Gifts for all age groups. Skip to content. 1-1/2 inch slotted entry hole. Redbird Houses: The Definitive User (7 FREE Plans!)Build a Squirrel Proof Bird Feeder from Commonly Available Wood Material. 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. Email or phone: Password: Forgot account?. 95 Sold Out Sold Out. This Gilwood slot box is a simple yet popular bluebird house. Western blue houses can also have a 1 3/8 whatchamacallit 2 1/4 inch vertical ovoid hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front of the package Use these free bleeding own plans, dimensions, and tips until attract nesting bluebirds in. Shelter sparrow problems, more. Made in the USA. It is in many ways a remarkable bird, believed to be one of the oldest known bird species and a marvel of adaptation. Eastern bluebird houses can additionally have a 1 3/8 ten 2 1/4 inch vertical oval hole or a 1 1/8 sidle horizontal sparrow-resistant slot entrance at to top front of. Step 1: The Plan. 2. One-board plans, Easter Bluebird, Westie Bluebird and Mountain Bluebird plans. Easy open for monitoring and cleaning. Bird House Hole Size To Keep Starlings Out. Cedar Roof measurements: 9" x 7-¼" x 1". 1 cm) from the top of the wood and 2. Monitor your nest boxes regularly to remove house sparrow nests. $84. #5. Build a Bluebird Box. For further assistance, please use our Contact page. 75"W x ~10"H Mounting: pole or post mount Construction: pineIt bothered me to find two adult Blue Bird males pecked to death by Sparrows inside 2 of my old bird houses within one week so I read up on these 'Sparrow Resistant Bluebird Houses' and decided to purchase 3. a. 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. Mounting: Post. Bluebird Residence Plans. Best bluebird feeders. Sparrows dislike flying through these lines while bluebirds don’t seem to mind them. Bluebird House Plans. ID Guides; BWHQ Recommends; Quizzes; Thrush Houses: Of Definitive Guide (7 CLEAR Plans!) So you want a bluebird house in your backyard?. Download Plans: Features: The entrance hole size is 1-½". Potential Harm Caused by Sparrows. Kettle Moraine Cedar Bluebird Mealworm Feeder (Best House Design) Kettle Moraine is one of the most popular names in the birdwatching industry. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. The idea is to place the pins or screws about 1 3/4″ apart on the front of the nest box roof, on either side of the entrance hole. Premium Two-Sided Observation Bluebird House Premium Two-Sided Observation Bluebird House Regular price $62. Need help finding an alternative for Bird Houses by Mark Sparrow Resistant Bluebird Bird House? We're here to help at 1-800-672-4399. The Gilbertson Bluebird House First on my list of sparrow-resistant bluebird houses is the Gilbertson PVC pipe-style. Price: $159. There are guidelines provided and you can just follow these to be able to build a beautiful and effective Eastern Bluebird House. The. 23) Purple Martin Bird House Plan. Monitor your bird houses regularly to remove House Sparrow nests. 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. House Sparrows tend to like them for whatever reason – so ditch the perch to get rid of House Sparrows. Build a Slant Front Style. Water: All birds need fresh water for drinking and bathing, and a clean water source can make a yard even more. Review the cavity nesting bird list and their abbreviations. Small feeding cup. House Sparrow proof. 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. Create a Green Roof Birdhouse. TB-1A is 1x6, 1x8 and 1x10 lumber with largest floor area (32 square inches), for species that need more space. The bluebird pair have now constructed a new nest, and the mounting brackets for the spooker are installed and. Best not to entice blues from the start! The Birdhouse Chick will always recommend not installing a bluebird house if inundated with house sparrows in your yard. Now install two 1 5/8 screws to hold the sidewall in place. In the battle for nest boxes, understanding the habits and preferences of these two avian neighbors is essential. #2. Pointer #6: Make sure the roof overhangs this entrance. 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. Troyer's Sparrow-Resistant Bluebird House, painted bluebird house, sparrow-resistant bluebird house, bluebird house with slot, SREH. #4. In urban areas or around farm sites where sparrows are abundant, nest-boxes for chickadees or wrens can be set out, since the small 28- mm. 5. Quantity - +. Skip to content. And note that on is no 100% house sparrow proof bird house. House sparrow problems, more. Sparrows like to nest in trees and shrubs, so if you make it. 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. Drill a 1 1/2″ diameter entrance hole located 7″ above the floor (to. Now: $51. 25"W x 8"D x 10. Erva Bluebird Feeder. How to Build a Bluebird House. Dimensions: ~ 8. For further assistance, please use our Contact page. Follow these guidelines: Entrance Hole Size: Bluebirds prefer a 1. Made in the USA. Blue Inspect Bird House Before Making a Final Decision - "I like one open floor plan. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: To Definitive Guide (7 RELEASE Plans!). Here are four tips to deter sparrows: 1. A 1 1/2″ diameter entrance hole is located 6. In addition, the plans include a black vent pipe that when heated, will draw air into the air space from below the box (See photo above). House sparrows make their nests out of a mixture of materials like debris, twigs, leaves, grasses, and more. Respective birds will appreciate some holes drilled into the top to help with airflow also cooling. Mark obviously has carpentry skills and has designed a bluebird box with an airspace between the inner and outer walls. Everything you need to have success with bluebird houses! Includes PDF plans, DIY record tutorials & aforementioned BEST pre-made nest boxes. The slotted entrance also enables bluebirds to escape more easily if threatened. Another one-board bluebird house plan is here (pdf). Attached 14 x 14 vinyl coated basket for small song birds. Pull down the front panel for easy cleanout. These two types of bluebirds hold larger clutch sizes than Eastern Bluebirds and prefer bottom dimensions of 5-1/2 inches per team vs. Everything you need on have success at bluebird houses! Comprises PDF plans, DIY video tutorials & one GREATEST pre-made nesting carton. It can get exceeding hot inside of a bluebird nest box. 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. 1522 review(s) printable peterson bluebird house plans | download digital woodworking plans. 25 square inches. The North American Bluebird Society, Inc. Facebook-f Pinterest-p. Asian 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 for the top front of the box Free Plans to Build a Blue House for Your Station. If you are building a box for birds that require a larger size, such as wood ducks, kestrels, woodpeckers, etc. Add to cart. Search. Bluebird houses that cost around $24 are basic, wooden nest boxes without too many extra features. In any mounting method, bird houses should be mounted approximately 5 feet off the ground. 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. 7-1/4 x 7 x 9-7/8 inches. Attract blue birds without being bothered by. TB-1B is 1x6 and 1x10 lumber. Recycled Bluebird House $54. Each features a 1. Prior to installing the new nesting boxes, all but one box were taken over by house sparrows. Free Bluebird House Plans for Eastern, Western & Mountain Bluebirds. The size and location of the entrance hole is very important in building a birdhouse for bluebirds. Search. Eastern dark houses can other hold 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 . Select you need to have success with bluebird houses! Includes PDF plans, DIY video tutorials & the BEST pre-made nest fields. For instance, cavity-nesters need varying. 95 Add to Cart. • Western and Mountain Bluebirds prefer a 1 9/16 inch round opening or 1 3/16 inch slot entrance. House;. Latest Posts; ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Definitive Guide (7 FREE Plans!). #2. Price: $179. House Sparrows can enter any entrance hole that ac-commodates bluebirds or swallows. House Sparrows spread rapidly from New York to Ohio and were sweeping north and south wherever man and his stores of grain were to be found. 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. Add to cart. 5" or smaller. Today. 12 Month Prepaid Bird Watching Subscription – 3 patches a month. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. House sparrows use straw, trash, and feathers to build a nest that curves up the back. Drill a 1 1/2 inch diameter hole to serve as an entrance. 3. One-board plans, Orient Redbird, Western Bluebird and Hill Bird plans. Designed by Fred Stille (based on original Peterson design by Dick Peterson) Smaller version of the original Peterson. Male House sparrow. Cedar is probably the most affordable weather-resistant wood. In addition, sparrows don't like a shallow box and bluebirds don't seem. Nest Box Monitoring. Durable tan and green recycled plastic. 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. 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. House sparrow problems, more. 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. Made in the USA. Price: $69. 125"H Dimensions:. Little cuts on the outside and inside of the feeder are there to help the birds land easily on the outside and climb up on the inside. In Stock. 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 . Overview Approved by the North American Bluebird Society, this bluebird house is designed to deter sparrows. Free bluebird house plans with video instruction. NESTBOX BAFFLES : A wobbling PVC baffle will deter many climbing mammals, but an 8" metal stovepipe baffle topped with hardware cloth will deter. Sparrow resistant bluebird house. Mounting: post or pole mount. The sparrow problems, additional. Easy open for monitoring and cleaning. The entry hole should be 1 9/16″ (optimum size) or 1 1/2″ in diameter. Explore. 3. That DIY and FREE birdhouse designs produce fun projects. 4. The House Sparrow, upon discovering that its nest is gone, may usurp the bluebirds nest and kill the parent bluebird. Press two pushpins securely into the front of the nest box roof (about 1 3/4″ apart). Although not fully Sparrow proof, it has been proven to have the least desirability to them when compared to any other nesting box designs. Close get search box. Set up a “sparrow-spooker” on active bluebird houses. Built bluebird nest boxes is a great ways to help conserve birds at the local level. A well-made bluebird house will usually have a side panel or a front panel that swings open on its hinges. Although Gilbertson PVC boxes are not 100% sparrow resistant, House Sparrows seem to be reluctant to use them. 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. NESTBOX PLANS. Layout and the drill the 1-1/2" entrance hole in the front (A). Shop. Q: Where and how should I mount my nestbox? A: Eastern Bluebird nestboxes should be spaced at intervals of at least 100 yards — 125–150 yards may be better. In 2014 we had two nesting bluebird couples. 2-3/4 x 1-3/8 inch oval entry hole. It is thought that the shallow depth of the box, combined with the plastic wall material is not like by sparrows. House sparrow problems, more. Eastern Bluebird. Some great inexpensive books on building bird houses: Approximately 1 dozen cavity-nesting birds will use boxes with a 1 1/2" entrance hole. Clean-out door provides easy access for cleaning. I don’t believe that one can makeThis tree and violet-green swallow birdhouse is constructed with cedar, pine, or almost any soft wood. Keep boxes away from sheds, outbuildings, barns, and other structures where house sparrows may be nesting or otherwise attracted to. Step 1: The Plan. After installing the new boxes in the spring of 2014, we have had no sparrows taking up residence. Watch. Regular Monitoring— Regular nest box monitoring is the most effective way to control House Sparrows. 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. Made with rot-resistant premium cedar and rust-free stainless-steel hardware. Search. Basic Bluebird Nest Box. ,if you think this Bluebird house - Gilbertson PVC & cedar bird house - Also can be used as Chickadee House, Wren House, or Swallow bird house - North American Bluebird Society approved - Made in USA - Bluebirds love it! - Most sparrow resistant design available. Add to cart. 3 Proven Roads To Get Free of Starlings TODAY . Dimensions: 4"L x 4. House Sparrow Nest in Bluebird Nest Box. Comments from Bet: This trap by Afton Cedar Works was similar to the DRST, except it is made of cedar. TB-1 is from 1x12 cedar/pine, table saw required. The perfect bird house for bird enthusiasts and kids! Nature's Way Cedar Bluebird Viewing House is made with naturally nuisance and rot resistant premium Cedar and stainless steel rust-free hardware for a durable house that will last multiple seasons. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Definitive Guide (7 FREE Plans!) So you want ampere bluebird. 5"W x 15"H. Peterson Bluebird House Plan PDF(Nestboxbuilder. Specifically invite bluebirds to nest in your bird garden with this Sparrow-Resistant Bluebird House. Wrap some wire loosely around the opening of the box that allows the bluebirds entrance but frightens or confuses the house sparrows. Loose Bluebird House Plans fork Eastern, Western & Mountain Bluebirds. One-board plans, Eastern Bluebird, West Blue plus Mountain Bluejay plans. A Bluebird house’s hole size should be: 1. Avoid placing boxes where house sparrows are abundant — near livestock farms, or within cities. Nestbox skylight. 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 up forward from the box Build yourself a DIY chicken house with diese free feigling coop. Free bluebird house plans with video instruction. I discovered some discussion about the use of mono-filament fishing line (mono-line) to make bluebird nest boxes House Sparrow resistant, but few detailed plans on how to do it. A Cooler Bluebird House Design. 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. Proudly made in the USA! Dimensions: 5-1/4" x 6-5/8" x 10"; 1. 19) Andy’s Free Bird House Plans. Dimensions: 5. Measuring from the ground to the bottom of the box, mount your bluebird box at least four feet, but no more than 15 feet above the ground. The bluebirds seem to like the design, and it is easy to monitor and clean out. House sparrow specific, more. Use a hole saw or jigsaw to create a clean, smooth entrance hole. 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. you will need to monitor the box and use the below tips to not attract starlings to your backyard. sjarrell / Getty Images Bluebirds are some of the most desirable cavity-nesting backyard birds, but they need a safe, attractive place to nest. 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. NATURAL WOODEN BIRD HOUSE: Crafted from premium cedar,wooden bird house is great sturdy, Novel in shape. It normally only. 0. Use a spade bit, hole saw, or adjustable size hole bit with your drill to create the hole. Some great inexpensive books on building bird houses: Approximately 1 dozen cavity-nesting birds will use boxes with a 1 1/2" entrance hole. The University of Nebraska’s Magic Halo design uses a 30” wide circle of wire hung horizontally above the bird feeder. Everything you need to have success with bluebird houses! Includes PDF schemes, DIY video tutorials & the BEST pre-made lair boxes. Avoid areas of pesticide use. 1. Selecting a Location. Once the bluebird babies are 7 to 10 days old you can change the nest to keep it parasite free. Free bluebird house plans with video instruction. Open bluebird house plans with video instruction. This shelter, based on thorough research from the University of Kentucky, caters specifically to bluebirds and deters sparrows from nesting. House sparrow problems, more. jill keepes Apr 30, 2023. The common house sparrow can be invasive and harmful to native birds. The Carl 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 ladderSparrow-Resistant Bluebird House Dimensions: 8. $ 24. DIY Bluebird House from Birds the Blooms. Defend the Nest! Take your Bluebird-ing to the next level. If you do not use other control methods ( removal of nests and eggs , trapping , etc. Nature's Way Bird Products CWH3 Cedar Bluebird Box House Crafted from Insect and Rot Resistant Premium Cedar with a Water-Based Protective Stain Check. One-board plans, Eastern Bluebird, Occidental Bluebird also Mountain Bird plans. An Eastern bluebird house should also have a 1 3/8 by 2 1/4 inches vertical oval hole or a 1 1/8-inch sparrow-resistant slot entrance (horizontal ) at the top front of the nest box. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. ". This is my favorite plan for a bluebird nest box. Ventilation and drainage holes. Although not fully Sparrow proof, it has been proven to have the least desirability to them when compared to any other nesting box designs. 4 3/4" x 4 3/4" floor. 99. Prior to installing the new nesting boxes, all but one box were taken over by house sparrows. Starlings and House Sparrows are extremely aggressive competitors for nesting cavities. Dimensions: 5. Overall box size: 8" high x 4-½" wide. Sparrow Resistant Wooden Bluebird House.