Facebook-f Pinterest-p Youtube. 75"H. View Details. Download a diagram showing the recommended box mounting method. Mount against any flat surface. By spacing out feeding areas, using predator guards and removing access to nesting locations, you can deter sparrows from your bird feeders. Wrens only need a 1-1/4" diameter entrance. ) entrance hole will prevent sparrows from entering the boxes. In any mounting method, bird houses should be mounted approximately 5 feet off the ground. It can get exceeding hot inside of a bluebird nest box. 1-1/2 inch slotted entry hole. SRP: $67. Finding. Free Bluebird House Plans for Eastern, Western & Mountain Bluebirds. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. 44) Hanging DIY Birdhouse Plan. 75"W x 10"H. 5 inches wide. Ships from Sperry, OK. And note that on is no 100% house sparrow proof bird house. The dimensions of the floors in traditional bluebird boxes are typically 4-by-5 inches. Found this (thanks Kathy Felty Clark)! Do not know if there are plans to build them yourself, though. NATURAL WOODEN BIRD HOUSE: Crafted from premium cedar,wooden bird house is great sturdy, Novel in shape. These include Tree & Violet-green Swallows, bluebirds, chickadees, wrens, nuthatches, and possibly titmice. 2. 95 Buy in monthly payments with Affirm on orders over $50. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. Build a Bluebird Trail! Save $$ when you purchase multiple nest boxes. Durable tan and green recycled plastic. Some studies have shown that bluebirds prefer a slot entrance to the standard circular hole entrance and sparrows prefer the opposite. These free bluebird house plans can help any birder. Material: Eastern White Pine. 5" from hole to recessed floor. House Sparrows prefer smaller seeds like millet, cracked corn, and milo, which are plentiful in inexpensive bird seed mixes. House sparrow problems, more. Made in the USA. 1. The vent holes on the side panels should be 3/4″ in diameter. com) The F30 bluebird nestbox has a large floor space, totaling 30. Discourage sparrows from overtaking your bluebird trail thanks to this Sparrow-Resistant Eastern Bluebird House. Step 2: Make an Entrance. Home;. 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. Overall box size: 8" high x 4-½" wide. The Sparrow Resistant Slot Bluebird House features a Kentucky slot style entrance. Assemble as shown (you can also use nails instead of screws). Cut an entrance hole for the sparrows on the front piece of wood with the 1 1/4-inch drill bit. is a non-profit education, conservation, and research organization that promotes the recovery of bluebirds and other native cavity-nesting bird species in North America. Made in the USA. 12 Month Prepaid Bird Watching Subscription – 1 patch a month. Dimensions: ~ 8. For more information on this bird house please see Amazon link below: you need to have success with bluebird houses! Includes PDF plans, DIY video tutorials & the BEST pre-made hide boxes. Since then, I learned of a trick from a friend that deters the house sparrows and allows the bluebirds. Avoid placing boxes where house sparrows are abundant — near livestock farms, or within cities. $10. suitable for you, give some share,Or you. These educational Fact Sheets and Plans for construction of Bluebird nest boxes/accessories are free to download and print (as indicated by (PDF) after each title) for your own use, or to use as handouts at Bluebird programs, or for anyone interested in Bluebirds. Free bluebird house plans with video instruction. Choose ground, hanging or deck rail bird feeder. Cedar Roof measurements: 9" x 7-¼" x 1". 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. . We utilize two types of predator guards to help limit predation of our bluebird nest boxes. You know adenine birdhouse is well-designed. 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. Facebook-f Pinterest-p Youtube. Opening: 4"L x 1. 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. Close here search box. This birdhouse for bluebirds help them defend their nest better. Latest Posts; ID Guide; BWHQ Recommends; Quizzes; Bleeding Houses: The Definitive Tour (7 FREE Plans!). 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. View Details. Directions: Use the provided photo of my measurements and mark out your board (you really just have to lay a tape measure along your board and mark the top row. Carolina Chickadee. Version 1. that easy). Everything you need to have success in bird houses! Includes PDF plans, DIY video tutorials & the OPTIMAL pre-made nest boxes. Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. COV-10044. Everything you need on have success at bluebird houses! Comprises PDF plans, DIY video tutorials & one GREATEST pre-made nesting carton. A table saw with its blade lowered was used for the drip kerfs on the underside of the roof and for the ladder kerfs on the inside of the front. Everything you need to have success with bluebird houses! Includes PDF schemes, DIY video tutorials & the BEST pre-made lair boxes. It is the responsibility of every bluebird landlord to ensure that no House Sparrows fledge from their boxes. General bluebird nest box dimensions should be: at least 9”x4. E. Keep boxes away from sheds, outbuildings, barns, and other structures where house sparrows may be nesting or otherwise attracted to. The most common price range for bluebird houses is between $24 and $40. How to Build a Bluebird House. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plans. Eastern Bluebird Birdhouse. Bird House Plans. Sparrows are larger than bluebirds, so they won’t be able to fit through the entrance hole. If sparrow nests are regularly removed, no young will fledge from the box. Once secure, attach the front piece to the side and bottom of the Bluebird house. 3 “sparrow-resistant” nest box designs (the pros and cons of each) #1. Download plan: Version 1: 178kb (pdf) Little Pete. • 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. Once the bluebird babies are 7 to 10 days old you can change the nest to keep it parasite free. Make those cuts (first cut should be on a 15-degree angle, the rest will be straight cuts). Go To Homepage. There is also a great deal of satisfaction from seeing a family of young birds fledge from a box you built! We have included 3 very good and successful designs below that are all easy to build, except where noted. House sparrow problems, more. Sparrow-resistant Bluebird House ITEM #: COV-10044 $59. Version 1. Steve Gilbertson uses the thinner-walled PVC because it is more flexible, and flexibility is what makes his. 70. House Sparrow proof. 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. Many Bluebirders believe that the slotted entrance makes this house sparrow resistant. For Western and Mountain Bluebirds, use a 1-9/16 inch round opening or 1-3/16 inch slot entrance. In this video, I build a bluebird house with slot entry. Add to cart. House Sparrow proof. House sparrow problems, more. 44) Hanging DIY Birdhouse Plan. Usage: Outdoor. This house is very attractive to the Bluebird species as well as Wrens, and other small bird species. 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. 125"L x 5. Layout and the drill the 1-1/2" entrance hole in the front (A). Also the nest tray takes cubic inches away from the cavity which also discourages sparrows. Skip till web. Made with rot-resistant premium cedar and rust-free stainless-steel hardware. Tip: we use a 16 x 16 plexiglass…. We would like to thank the legions of NestWatchers who monitored 12,274 nest boxes (both guarded and unguarded), enabling this comparative study. Press two pushpins securely into the front of the nest box roof (about 1 3/4″ apart). Materials: This house has a western red cedar roof. House sparrow problems, more. Another one-board bluebird house plan is here (pdf). Facebook-f Pinterest-p Youtube. A "bluebird" house placed next to a shrubby thicket likely be of interest to a Car- olina wren. Below are fun, out-of-the box birdhouses that add style to walkways and gardens. 5" or smaller. Bluebirds, cardinals, red, else. Made in the USA. Eastern Bluebirds fit easily through a 1-1/2" entrance hole. There are guidelines provided and you can just follow these to be able to build a beautiful and effective Eastern Bluebird House. 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. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. Cut a 22-degree bevel across the top of the front section (A). 3-1/2 x 1-1/8 inch slotted entry hole. Open bluebird house plans with video instruction. Tree & Violet Green Swallow Birdhouse. 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. House sparrows make their nests out of a mixture of materials like debris, twigs, leaves, grasses, and more. Wrens only need a 1-1/4" diameter entrance. Keep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow-Resistant Bluebird House with Open Top. 6. House Sparrows will readily use them in the absence of bluebird competition. Classic Bluebird Bird House, Cobalt Blue. Insert the nail to hold the side door closed. Eliminate Garden Pests By Building A Bluebird House. Bottom we must included free bluebird house plans, a simple one-board box that's relatively easy to build. 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. ". Use the attached, back hanger to place the home against a post or wall, or pole mount it with a mounting bracket (not included). org. One-board plans, Eastern Deep, Eastern Bluebird and Mountain Bluebird plans. Eastern bluebird houses ability also own adenine 1 3/8 efface 2 1/4 inch vertical oval hole or a 1 1/8 inch horizontal sparrow-resistant slot entrance at the top front of the. Opening: 4"L x 0. 18) Birdhouse Designs. Another one-board blackbird my plan is here (pdf). The entrance hole should be 1-1/2" in diameter and placed near the. Prevent Heat Stress. 5 inches (6. Note: This package contains 2 of the Sparrow-Resistant Cedar Eastern Bluebird Houses by Prime Retreat. 25"W x 8"D x 10. Lodge sparrow problems, more. 5 x 7-1/4 x 9-5/8 inches. Close this search box. Coveside Conservation Sparrow Resistant bluebird house, Model # 10044. Tip #3: Include vents at the top of your bluejay house. Facebook-f Pinterest-p. 42) CBRP Bluebirds House Plan. Now we are going to attach the swinging side to the Bluebird house. Drill birdhouse entrance hole. These all use exclusively right angle. It's the first video, "Sparrow resistant Bluebird box". 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. Opening: 4"L x 1. Here are four tips to deter sparrows: 1. TB-1B is 1x6 and 1x10 lumber. This birdhouse for bluebirds help them defend their nest better. 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. House Sparrows will readily use them in the absence of bluebird competition. This model includes a stay-clear, crack-resistant viewing window to allow for nest viewing. Measure and Cut Bluebird House Door. The squares are 1 1/2 " × 1 1/2" Completely assembled ready to use, holds most all types of bird seed. Drill 5/8" vent holes 1" down from the top and 2" in from each side. 25 $ 72. At least, this keeps the sparrow population from increasing. ,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. Wrens and Eastern bluebirds can fit into smaller entrances than the larger house sparrows and starlings. The North American Bluebird Society, Inc. Monitor nest boxes every day. 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. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: To Definitive Guide (7 RELEASE Plans!). A two-hole box is not technically a HOSP-resistant box. 75"H. A tree or suitable perch 40 to 100 feet from the box provides a perfect rest stop for young on their first flight. Shelter sparrow problems, more. Triangle Bluebird House. Add to cart Sparrow Resistant Wooden Bluebird House. Modern Birdhouse Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. Use a hole saw or jigsaw to create a clean, smooth entrance hole. 42) CBRP Bluebirds House Plan. Attract blue birds without being bothered by. 22. Photo by stevesunusual is licensed under CC BY-NC-ND 2. Build the eastern bluebird birdhouse with red cedar, pine, or almost any soft wood. Made in the USA. for mountain bluebirds), then use a rasp to even out the edges. 25"W x 6. Note: This package contains 2 of the Sparrow-Resistant Cedar Eastern Bluebird Houses by Prime Retreat. Premium Two-Sided Observation Bluebird House Premium Two-Sided Observation Bluebird House Regular price $62. It is thought that the shallow depth of the box, combined with the plastic wall material is not like by sparrows. This spring I noticed the bluebirds entering the box and now it is in use by the bluebirds. The Sparrow Resistant Slot Bluebird House features a Kentucky slot style entrance that discourages English Sparrows. Birders who want to offer birdhouses only to a specific type of bird, such as bluebirds or purple martins, can learn when the best time to put up houses for that species may be. See Bird House Hole Size if you want to attract a specific bird. Bird Houses Diy. 9 North American Owls Nest in Boxes. From this “halo” you then optionally hang four thin wires weighted at the bottom to hold. Touch device users, explore by. Contents [ hide] Best Bluebird Feeder Reviews. Set up your nest box in an open area, away from houses and barns. Discount applied at. Bird house is 10"h x 6"w x 8-1/2"d. This birdhouse (nest box) is made using a piece of wood and PVC pipe. Floor plans outline the rooms of a home, showing which doors, windows as well as furniture and fixtures will be. Monitoring Guide (PDF) (by Hatch Graham). Keep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow. Bluebird House Plans. NESTBOX BAFFLES : A wobbling PVC baffle will deter many climbing mammals, but an 8" metal stovepipe baffle topped with hardware cloth will deter. A ready-made, weather-resistant Sparrow Spooker is now commercially available from Sparrowtraps. Purchased item: Universal Sparrow Spooker. For further assistance, please use our Contact page. Roof is made from Poly-Tuff™ for greater exterior quality. 2. Watch. It has a 5″ by 5″ floor (inside dimensions) and 8″ floor to ceiling height (inside front). Bluebirds are fussy about their nest sites, and the size of the entrance hole is very important for attracting a nesting pair. Clear bluebird house plans with picture instruction. you will need to monitor the box and use the below tips to not attract starlings to your backyard. 00. Use a spade bit, hole saw, or adjustable size hole bit with your drill to create the hole. House sparrows, also called. For best results do not place house near trees or bushes, placing the house in the open will work best for Bluebirds. Made in the USA. Materials: This house has a western red cedar roof. Free Bluebird Your Plans for Eastern, Western & Berg Doves. 00 / month. 1-1/2" diameter slot entrance perfect for Eastern Bluebirds. Place away from dense cover (shrubs, thickets) and woods. Prior to installing the new nesting boxes, all but one box were taken over by house sparrows. Attract blue birds without being bothered by sparrows. 4 3/4" x 4 3/4" floor. Build a Pitched Roof Bluebird House. Drill at a slight downward angle, going through the front of the house and into the side. 4. Bluebirds prefer to nest in open areas with low or sparse ground cover. Potential Harm Caused by Sparrows. Cracking the Cord of Wood Code: Understanding the Basics and Factors Affecting the Amount of Wood in a Cord. 25"H; Weight: 4 lbs. Sparrows dislike flying through these lines while bluebirds don’t seem to mind them. Bluebird Nestbox Designed by: Andrew Troyer Drawn by: Fred Stille, Sr. Available bluebird house plans in video instruction. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. One-board plans, Eastern Bluebird, Western Bird and Mountain Bluebird plans. Features slotted entrance to deter House Sparrows. Water: All birds need fresh water for drinking and bathing, and a clean water source can make a yard even more. Sep 22, 2019 - This Feeders & Birdhouses item by birdhousesbymark has 20 favorites from Etsy shoppers. Bluebird houses that cost around $24 are basic, wooden nest boxes without too many extra features. 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. 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). For more information on controlling house sparrows, please visit sialis. by Fred Stille and Steve Gilbertson. 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. #5. Using a water proof siding material, like Hardie board siding, can also work in place of or on top of the roof. This video demonstrating how to mount a Gilbertson Bluebird House. Drill a 1 1/2″ diameter entrance hole located 7″ above the floor (to. Bluebirds, cardinals, martins, etc. Opening: 4"L x 0. Pull down the front panel for easy cleanout. $120. 125"H; 5. Bluebird babies or adults inside the box. Made in the USA, available exclusively at Duncraft. That DIY and FREE birdhouse designs produce fun projects. A 1 1/2″ diameter entrance hole is located 6. 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 . Features two wooden dowel perches on either side of the entrance to provide your bluebirds with a predator lookout. 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. k. 1k) $62. To work, the line must be installed at the beginning of the nesting season, before any sparrows lay claim to the bluebird box. Give Bluebird House A Superior Look By Painting It. How to Sparrow-Proof a Bluebird House. If you are building a box for birds that require a larger size, such as wood ducks, kestrels, woodpeckers, etc. Gilbertson Nest Box - NABS Approved from $36. Latch screw (or nail) Note:ifusng nail, drill hole down at angle as shown 1/8" dia. The entry hole should be 1 9/16″ (optimum size) or 1 1/2″ in diameter. 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 . Check out this video on Dean Rust's site (Dean is a county coordinator for the PA Bluebird Society). Arizona house plans, floor plans & designs. Free bluebird house plans with video instruction. competitors such as house wrens and house sparrows will use perches to gain access to a box. This will allow the mylar strips to blow. Free bluebird house plans with video instruction. Close is search box. 1 cm) from the top of the wood and 2. Includes PDF plans, DIY video video & the BEST pre-made nest boxes. A minimum of 5′ enables most people to easily monitor and maintain the house. 810–3. 25"W x 8. Baby don’t require one, and it will all encourage other birds, that as House Sparrows. There are toe holds under the entrance inside. 7. Boxes should be provided with drainage and ventilation spaces. 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. We determined which pieces of wood would be designated for the different parts of the birdhouse. 125"H Dimensions:. In this article, you’ll learn how to build or buy the right Sparrow bird house. These DIY and FREE aviary dates produce fun projects. 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. The Gilwood Bluebird House Another nest box design that deters house sparrows is the Gilwood bluebird. Facebook-f Pinterest-p Youtube. After a failed nesting attempt in my bluebird nest box due to house sparrow attack, I decided to purchase a sparrow spooker vs trying to construct one. Choose from three options: birdhouse. Hang the birdhouse at least 5 feet off the ground on a tree, as blue jays prefer nesting in trees rather than in houses mounted on poles. As we had a diverse array of board lengths, we first organized them into piles of similar size. 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. NABS Fact Sheets & Plans. Free bluebird house plans with video instruction. Cracking the Cord of Wood Code: Understanding the Basics and Factors Affecting the Amount of Wood in a Cord. Sparrows can be aggressive and persistent, which means they may remove bluebird eggs or chicks and take over the nesting box. While there aren’t any bluebird houses that are 100% sparrow-resistant, there are a few nest box designs that have been shown to deter house sparrows on some level. Find more free bird houses plans or discover more birdhouses and bird feeders. The tube shape paired with the coloring of this birdhouse represents the look of a birch tree. Avoid using bluebird houses with larger entrance holes or slot entrances. Free bluebird house plans with video instruction. 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. Residence;. Ideally, the entrance hole should face away from prevailing winds. As a general rule, it is OK to open a bluebird house for monitoring. This blue birdhouse is sparrow resistant. House sparrow problems, more. Although Gilbertson PVC boxes are not 100% sparrow resistant, House Sparrows seem to be reluctant to use them. -Trap and kill the House. Unfortunately for nesting birds here in mid-TN there are a number of predators and pests that can deter, disrupt, or destroy an attempt to nest. 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 bluebird house on the market. I’m convinced that if properly applied and maintained the treatment can make a nest box. 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. Skip to satisfied. Wrap some wire loosely around the opening of the box that allows the bluebirds entrance but frightens or confuses the house sparrows. These two types of bluebirds hold larger clutch sizes than Eastern Bluebirds and prefer bottom dimensions of 5-1/2 inches per team vs. Chickadees, Nuthatches & Downies Cuddle in Winter. When natural nesting sites are scarce, these birds will readily move into a birdhouse that's built. 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. 5625 inch (3. • Western and Mountain Bluebirds prefer a 1 9/16 inch round opening or 1 3/16 inch slot entrance. Drill 5/8" vent holes 1" down from the top and 2" in from each side. Predrilled holes on the back of the home make it easy to attach to a wall or post using screws, and the cedar body is sure to remain durable and lovely. Choose you must to have success with bluebird houses! Includes PDF map, DIY video tutorials & the BEST pre-made nest boxes. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Definitive Guide (7 FREE Plans!) So you want ampere bluebird. Make a 4″ by 4″ floor (inside dimensions) and 9″ floor to ceiling height (inside front). 5"L x 7"W x 10. Some sparrows canFree bluebird house plans with view instruction. Good style for a nestcam. Add to cart. The sparrow problems, additional. Plans for a simple. Create a sparrow resistant Bluebird box by adding a skylight. House Sparrows can easily produce three to five broods per season. 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. Eastern bluebird houses capacity also have a 1 3/8 x 2 1/4 inch vertical oval drill or a 1. How to Build a Bluebird House. NESTBOX PLANS.