bluebird house plans sparrow resistant. LEFLEUR BIRDBATH or PLANTER (4 Color Options): Solid Stone Durable Container. bluebird house plans sparrow resistant

 
 LEFLEUR BIRDBATH or PLANTER (4 Color Options): Solid Stone Durable Containerbluebird house plans sparrow resistant org

For cavity-nesting birds, houses can provide the perfect place to build a nest and nurture. One-board plots, Eastern Bluebird, Western Blue plus Mountain Bluebird dates. TB-1B is 1x6 and 1x10 lumber. Eastern blackbird list ability also have a 1 3/8 ten 2 1/4 inch vertical round drilled or a 1 1/8 inch horizontal sparrow-resistant slot entrance to the top front on the boxes . 1 Helpful. Materials: This house has a western red cedar roof. Approved by the North American Bluebird Society (NABS). 5 inches (6. Home; Latest Item; YOUR Guides; BWHQ Recommends;. Finding. Skip to content. No quality bluebird house can compete with. 99 USD Regular price Sale price $59. From this “halo” you then optionally hang four thin wires weighted at the bottom to hold. Bird Houses Diy. Assemble as shown (you can also use nails instead of screws). Make those cuts (first cut should be on a 15-degree angle, the rest will be straight cuts). Set up your nest box in an open area, away from houses and barns. AN simple go build, yet proven bluebird house such is made mostly from one cedar house. How do you sparrow proof a bluebird house. See Bird House Hole Size if you want to attract a specific bird. In 2014 we had two nesting bluebird couples. One-board plans, Eastern Bluebird, Western Bird and Mountain Bluebird plans. 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. This birdhouse for bluebirds help them defend their nest better. Once the bluebird babies are 7 to 10 days old you can change the nest to keep it parasite free. 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). Facebook-f Pinterest-p Youtube. Bluebirds, cardinals, martins, etc. We determined which pieces of wood would be designated for the different parts of the birdhouse. competitors such as house wrens and house sparrows will use perches to gain access to a box. 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. Therefore, just because a box is called a "bluebird" housecontaining millet and cracked corn. Free Bluebird House Plans for Eastern, Western & Mountain Bluebirds. This video demonstrating how to mount a Gilbertson Bluebird House. Baby don’t require one, and it will all encourage other birds, that as House Sparrows press European Starlings, to getting the house or give robbers a place to state. Find perfect accommodations for your blues. 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). All plans include diagrams and instructions. ) entrance hole will prevent sparrows from entering the boxes. Eastern Bluebird. In 2014 we had two nesting bluebird couples. 0:13 – Repopulation of Bluebirds: a success story 0:48 – Where cavity nesters find homes 2:11 – Identifying Bluebirds 2:52 – Preferred habitat 4:09 – When to expect Bluebirds 4:48 – How many eggs 5:07 – How can people help house Bluebirds 5:33 – Where to find Bluebird house plans 6:00 – Birdhouse materialsFor all three species of bluebirds, a 1 9/16 inch round hole is acceptable. Plans are open as PDF's and inclusion easy step-by-step video. The North American Bluebird Society, which provided the plans, says rural areas, cemeteries, golf courses and parkways with. Free bluebird house plans with tape instruction. For best results do not place house near trees or bushes, placing the house in the open will work best for Bluebirds. Troyer's Sparrow-Resistant Bluebird House, painted bluebird house, sparrow-resistant bluebird house, bluebird house with slot, SREH. If you’re wondering what the correct way to. How to sparrow proof a bluebird house. The back piece of the xbox is attached to the inner roof. 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. Sparrow-resistant Bluebird House ITEM #: COV-10044 $59. Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. 3-1/2 x 1-1/8 inch slotted entry hole. Mark obviously has carpentry skills and has designed a bluebird box with an airspace between the inner and outer walls. 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. Designed by Steve Gilbertson of Aitkin MN, the Gilwood has since established itself as a favorite with both Bluebirders and the. Wild Wings cedar bluebird box house is approved by North American bluebird society by meeting or exceeding their standards. Provide beautiful, musical bluebirds a secure roosting option by adding this handmade Sparrow-Resistant Cedar Eastern Bluebird House by Prime Retreat to your yard. House sparrows use straw, trash, and feathers to build a nest that curves up the back. Sparrow Spooker set contains (2) horizontal arms with streamers and (2) vertical posts. This Kentucky style, slot entrance bluebird house is designed to thwart sparrows. Dimensions: 5. Everything you need to have success with bluebird housings! Includes PDF plans, DIY video tutorials & the BEST pre-made nest boxes. Facebook-f Pinterest-p Youtube. I looked at these few plans, and improvised my own methods with I will refer to as ‘treatments’. 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. The Sparrow-Resistant Bird House is crafted specifically for bluebirds,. ". Roof is made from Poly-Tuff™ for greater exterior quality. 18) Birdhouse Designs. The brand is known for making quality products and this mealworm feeder represents one of the best from its collection. Dear;. Vinyl-coated. Bluebird houses that cost around $24 are basic, wooden nest boxes without too many extra features. These “people” I describe represent the English House Sparrow, a. If PVC boxes are paired with a wooden box, House Sparrows tend to choose the wooden box. It can get exceeding hot inside of a bluebird nest box. 3. To attach this piece, hammer nails through the front piece into the edges of the base and walls. 43) Modern Cardinal Birdhouse Plan. TB-1B is 1x6 and 1x10 lumber. Dimensions: 5. 50. 95. 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. 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. Add to cart. The Gilwood Bluebird House Another nest box design that deters house sparrows is the Gilwood bluebird. Bluebirds can be found throughout the state, and are most common in rural areas. 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. Learn more Free. Mounting: post or. Measures 8" by 9" by 12". . Build a Pitched Roof Bluebird House. Create a Green Roof Birdhouse. Oriental Bluebird Shelter Plan - A nest-box plan for cavity-nesting. Use a hole saw or jigsaw to create a clean, smooth entrance hole. containing millet and cracked corn. Dimensions: ~ 8. The House Sparrow, upon discovering that its nest is gone, may usurp the bluebirds nest and kill the parent bluebird. Steve Gilbertson uses the thinner-walled PVC because it is more flexible, and flexibility is what makes his. If not for the House Sparrows, we would be using the round hole. Explore. Construction: pine. Building nest boxes is a fun, relaxing activity that can also save you money. The minimum height to install the bluebird house is at least 5′ from the ground. 25"H; Weight: 4 lbs. Sparrow Resistant; BLUEBIRD HOUSE; WEATHERPROOF RECYCLED POLY; Bright. Free bluebird house plans with video instruction. A birdhouse with a floor space of roughly 4 inches by 4 inches would suffice. 5” where the base of the floor is a 4. The Amish Gilbertson Bluebird House has a round birch-like log bottom and a strong squared top made of eco friendly poly (recycled plastic). Attract bluebirds or Tree Swallows to eat your insects. Cut the entry hole by drilling two overlapping holes with a 1-3/8- in. Monitoring Guide (PDF) (by Hatch Graham). Too big, and the more aggressive starlings and sparrows will out-compete the little bluebirds. TB-1 is from 1x12 cedar/pine, table saw required. 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. The hole should be 1 inch below the 5 1/2-inch top edge of the front, equidistant from each side. The distance of the floor from the bottom of the entrance hole in a standard bluebird box is typically 5 to 6 inches. A minimum of 5′ enables most people to easily monitor and maintain the house. Best bluebird feeders. It is the only bluebird house that comes with vent plugs to block out blackflies when they become a problem. Home; Latest Posts; ID Guides; BWHQ Advocates; Quizzes; Menu. Cut a 22-degree bevel across the top of the front section (A). This birdhouse (nest box) is made using a small piece of wood and PVC pipe. 3 Proven Roads To Get Free of Starlings TODAY . Bluebird house planning, plans incorporate a free PDF download, material list, drawings, the instructions. 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. Place away from dense cover (shrubs, thickets) and woods. Eastern Bluebirds fit easily through a 1-1/2" entrance hole. Building a birdhouse for House Sparrows is one of the most uncomplicated and most enjoyable activities. Designed by Steve Gilbertson of Aitkin MN, the Gilwood has since established itself as a favorite with both Bluebirders and the Bluebirds. If you are building a box for birds that require a larger size, such as wood ducks, kestrels, woodpeckers, etc. only 4 inches/side available Eastern Bluebirds. Opening: 3. Arizona house plans, floor plans & designs. House Sparrows can easily produce three to five broods per season. For further assistance, please use our Contact page. House Sparrow proof. House sparrow problems, view. But Linda Violett of California has found that somehow Western bluebirds seem. k. There are several ways to discourage them from using nest boxes, ranging from boxes specifically designed to dissuade sparrows to traps to eliminate them. Skip to topic. In this article, you’ll learn how to build or buy the right Sparrow bird house. Sparrow Resistant Wooden Bluebird House. . Step 1: The Plan. ), you risk HOSP attacks and are enabling HOSP populations to explode. Avoid areas of pesticide use. $84. Price: $69. Eastern pink houses can also have a 1 3/8 x 2 1/4 inch vertical oval hole or a 1 1/8 creep landscape sparrow-resistant slot entrance at the up front of the choose Free Plans to Make one Bluebird House for The Yard. 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. spade bit (1-1/2 in. It is thought that the shallow depth of the box, combined with the plastic wall material is not like by sparrows. The slotted entrance also enables bluebirds to escape more easily if threatened. 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. The best way to keep house sparrows out of your bluebird houses is to make your. 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. It's the first video, "Sparrow resistant Bluebird box". 1-1/2 inch slotted entry hole. (optimum) Alternate: 1 1/2"This is one of the best sites for information on bluebirds additionally nest box plans. Layout and the drill the 1-1/2" entrance hole in the front (A). Made from Eastern white pine, which weathers beautifully to blend in with your backyard landscape. Nabs factseet north american bluebird society. containing millet and cracked corn. The entrance hole should be 1-1/2" in diameter and placed near the. 95 Sold Out. Ravenox Sparrow Resistant PVC Bluebird House. You know adenine birdhouse is well-designed. Features maximum ventilation, predator guards and fledgling kerfs. Here are four tips to deter sparrows: 1. Dimensions: 9. Available bluebird house plans in video instruction. 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. Make a Bluebird Trail. This Gilwood slot box is a simple yet popular bluebird house. Nest Box Monitoring. Home; Latest Posts;. House Sparrows can enter any entrance hole that ac-commodates bluebirds or swallows. Even if you aren't a birding enthusiast, you will quickly recognize this smallish bird (about 6 inches from head to tip of. Give Bluebird House A Superior Look By Painting It. This house is very attractive to the Bluebird species as well as Wrens, and other small bird species. $10. Drill at a slight downward angle, going through the front of the house and into the side. 1522 review(s) printable peterson bluebird house plans | download digital woodworking plans. 00. . 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. The Duncraft box has a floor 5 1/2″ x 5 1/2″ (based on the dimensions shown in their ad), for a huge floor space of 30. The tube shape paired with the coloring of this birdhouse represents the look of a birch tree. One-board plans, Eastern Deep, Eastern Bluebird and Mountain Bluebird plans. Version 1. Touch device users, explore by. Made in the USA. Search. Facebook-f Pinterest-p Youtube. Sparrows like to nest in trees and shrubs, so if you make it. We utilize two types of predator guards to help limit predation of our bluebird nest boxes. you will need to monitor the box and use the below tips to not attract starlings to your backyard. Purchased item: Universal Sparrow Spooker. Sparrow resistant Bluebird box Dean Rust 862 subscribers 122K views 10. Pointer #6: Make sure the roof overhangs this entrance. Free bluebird house plans with video instruction. Open the front panel for easy cleanout. The North American Bluebird Society, Inc. Made in the USA. Some have found that if PVC boxes are paired with a wooden box, House Sparrows tend to choose the wooden box. #2. Close get search box. Step 2: Make an Entrance. Face boxes toward open areas in any direction. Usage: Outdoor. ID Guides; BWHQ Recommends; Quizzes; Bluebird Houses: The Definitive Guide (7 FREE Plans!) So you want ampere bluebird. 5" or smaller. 5" from hole to recessed floor. from basic nest box to bluebird mansion! Vinyl Bluebird House $109. To keep starlings out of a bird house, the hole must be 1. It also deters predators from reaching in and attacking the nest. House Sparrow proof. After installing the new boxes in the spring of 2014, we have had no sparrows taking up residence. Nest Box Care. Each features a 1. The squares are 1 1/2 " × 1 1/2" Completely assembled ready to use, holds most all types of bird seed. Everything you need go have success is bluebird houses! Includes PDF plans, DIY movie tutorials & the BEST pre-made nest boxes. 19) Andy’s Free Bird House Plans. Therefore, just because a box is called a "bluebird" house BirdInformer BESTSELLER # 2. 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. The Coveside Winter Roost Box is a a great shelter box made out of white pine with 3 perches inside to accomodate up to 6 birds or more (depending on size and how close and cozy they want to be) on cold, winter nights. For further assistance, please use our Contact page. Eliminate Garden Pests By Building A Bluebird House. Attract bluebirds to nest in your backyard. Free bluebird house plans with video instruction. 7. Gilbertson PVC Box. easy to monitor, real resistant to tempestuous weather and predators. This Erva Bluebird Feeder comes with a stunning blue powder-coated top and bottom and has multiple features for feeding bluebirds specifically. However, making your own, taller baffle will offer your bluebirds substantially. Sparrows are known to cause several problems in bluebird houses. ,. Opening: 4"L x 0. TB-1A is 1x6, 1x8 and 1x10 lumber with largest floor area (32 square inches), for species that need more space. Some have found that if PVC boxes are paired with a wooden box, House Sparrows tend to choose the wooden box. Search. For best results do not place house near trees or bushes, placing the house in the open will work best for Bluebirds. 43) Modern Cardinal Birdhouse Plan. The Sparrow Resistant Slot Bluebird House features a Kentucky slot style entrance. Some sparrows canFree bluebird house plans with view instruction. These all use exclusively right angle. Each box has a 2 1/2 inch diameter skylight covered with clear plexiglass. That is the short and sweet answer for where to place a. General bluebird nest box dimensions should be: at least 9”x4. Below we have included free bluebird house plans, a simple one-board box that's ratively easy to make. To this post, I may included everything you need to get about einholen started with bluebird houses:. Bluebird Control Bird House Before Making a Last Decision - "I like the opens floor plan. As we had a diverse array of board lengths, we first organized them into piles of similar size. 00. House Sparrow. 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. One-board plans, Eastern Bluebird, Western Bluebird and Mountain Bluebird plots. See moreTo mitigate this issue, it’s crucial to employ sparrow-resistant features in. Cut a 22-degree bevel across the top of the front section (A). The Sparrow Resistant PVC. 1-1/2" diameter slot entrance perfect for Eastern Bluebirds. House sparrow problems, more. All Things Bluebirds reminds us that Bluebird predators are an absolute certainty in the Bluebird world! Unfortunately, there are no exceptions to that rule. This bluebird house from Cedar Alpa is again made with premium red cedar wood, which is known for its weather-resistance features and durability. Everything to need to take success with bluebird home! Includes PDF plans, DIY video how-to & the BEST pre-made nest boxes. I don’t believe that one can makeThis tree and violet-green swallow birdhouse is constructed with cedar, pine, or almost any soft wood. These include Tree & Violet-green Swallows, bluebirds, chickadees, wrens, nuthatches, and possibly titmice. 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. 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. 14 Bluebird House Plans Sparrow Resistant; 15 KEEP HOUSE SPARROWS OUT OF YOUR BLUEBIRD HOUSE; 16 Birdhouses – Mass Audubon; 17 Problem Solving – Michigan Bluebird Society; 18 How Can I Keep House Sparrows Out of Bird Houses Like Bluebird Houses; 19 5 PROVEN Ways to STOP House Sparrows at. 25"W x 8"D x 10. 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. This is my favorite plan for a bluebird nest box. Tip: we use a 16 x 16 plexiglass…. Another simple way to reduce the number of House Sparrows and European Starlings around your property is to avoid feeding them. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. It normally only. 00 $ 22. DutchCrafters Small Sparrow Resistant Bluebird Post Mount Poly Bird House - Choose Your Colors - Amish Made in America. Discount applied at. Opening: 4"L x 1. 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 1. Measure up 11" from the bottom edge, centering the entrance hole across the width. Air vents allow for maximum air ventilation through wall and floor openings for bird health. Managing house sparrows sialis. 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. For a metal T-post, or small wood post, you can make a V-cut instead in the center with three small tabs that can beKeep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow-Resistant Bluebird House with Open Top. 75"W x 10"H; Opening: 4"L x 1. Cut the entry hole by drilling two overlapping holes with a 1-3/8- in. The bluebird should have a house measuring about 5" in length and width, inside measurements, and 8" or more in depth. 5"W x 10"H Mounting: pole or post mount Construction: pineBird Feeder Poles. One-board plans, Eastern Bluebird, Western Bluebird furthermore Mass Bluebird plans. NABS (North American Bluebird Society) Approved. 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. Free bluebird house plans with film instruction. 75"H each. Your purchase directly supports Scenic Rivers Industries, a workshop that provides dignified employment for people with disabilities. 5" or smaller. Bluebird Nestbox Designed by: Andrew Troyer Drawn by: Fred Stille, Sr. We would like to thank the legions of NestWatchers who monitored 12,274 nest boxes (both guarded and unguarded), enabling this comparative study. Skip to content. 44) Hanging DIY Birdhouse Plan. Opening: 4"L x 1. House sparrow problems, more. 12 Month Prepaid Bird Watching Subscription – 3 patches a month. 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. The sparrow problems, additional. 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. The tube shape paired with the coloring of this birdhouse represents the look of a birch tree. Sep 22, 2019 - This Feeders & Birdhouses item by birdhousesbymark has 20 favorites from Etsy shoppers. Attract bluebirds, then watch your bluebirds fledge. Skip in content. Eastward bluejay houses cannot also have a 1 3/8 x 2 1/4 inch vertical oval perforation or a 1 1/8 infeed horizontal sparrow-resistant. Use a bluebird house with a small entrance hole. Predator Guard Designs. They will often kill baby birds and build their nest on top of the dead babies. Use One Board To Build A Bluebird House. This Gilwood slot box is a simple yet popular bluebird house. Everything you must until having success with bluebird houses! Includes PDF plans, DIY videos tutorials & the BEST pre-made nest boxes. The bluebird and the sparrow women of the west book 10. Home; Latest Stations; ID Guides; BWHQ Recommends;. Home;. Liberate bluebird house plans with video instruction. Although not fully Sparrow proof, it has been proven to have the least desirability to them when compared to any other nesting box designs. Product Details. Drill a 1/8" hole, in each side panel, 9 1/2" from the bottom and 3/8" from the front. One-board plans, Eastern Bluebird, Western Bluebird plus Mountain Bluebird plans. Bottom we must included free bluebird house plans, a simple one-board box that's relatively easy to build. jill keepes Apr 30, 2023. Learn more at:The House Sparrows do not seem to be as interested in the slot type boxes. Found this (thanks Kathy Felty Clark)! Do not know if there are plans to build them yourself, though. 75"H. Opening: 4"L x 0. Now install two 1 5/8 screws to hold the sidewall in place. Keep parasites away from young birds in 4 different houses using these Classic Bluebird House Nest Lifts. FREE shipping and the BEST customer service!How Toward Building Bluebird House Plans Video. One-board plans, Easter Bluebird, Westie Bluebird and Mountain Bluebird plans. Attaches to the Bluebird house during the egg laying and newly hatched stages. Build the eastern bluebird birdhouse with red cedar, pine, or almost any soft wood. One-board schemes, Eastern Bluebird, Western Bluebird or Mountain Bluebird plans. The most common problems are the House Sparrow, Raccoons, and Rat snakes. Measure and Cut Bluebird House Door. $120. This birdhouse (nest box) is made using a piece of wood and PVC pipe. 25"L x 1. House sparrow problems, more. If you see evidence of house sparrows, discard their materials. Quality western red cedar construction. Clear bluebird house plans with picture instruction. Materials: This house has a western red cedar roof. This spooker is readily mounted on any style box. Bird House Hole Size To Keep Starlings Out. Below are have included free bluebird house plans, a simple one-board box that's relatively easy to built. 99 USD Regular price. Tip #3: Include vents at the top of your bluejay house. 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 . Sparrow Proof Bluebird House. Keep the threat of unwanted sparrows away from fantastic bluebirds with this Sparrow. Measure down the front panel 1 ¼ inch and drill two pilot holes. 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.