The Gilbertson nesting birds produced more young than the Peterson boxes , suggesting that less than ideal box design could compromise fitness of parents and offspr ing. Birdhouse Projects. With a 30. A wren guard is a small barrier or hood -like structure that blocks the vision of a birdhouse entry hole. 3) The Right Nest Boxes. Sparrow-resistant boxes are criticial to keep out the Bluebird’s deadly nemesis: The House Sparrow! We recommend Slot Boxes or the Gilbertson Nest Box along with dedicated monitoring. Gilbertson PVC Nest Box. 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 be. "New Gilbertson style PVC Bluebird next box. This reduced roof warping, sealed the water out, and made the roof stronger to mount. Western and Mountain Bluebirds typically stay in the nest longer than Eastern Bluebirds - 22-23 days, depending on the weather. . . There are 31 other people named Gilbertson Steve on AllPeople. It needs to face the right way. For more on this, ask us at the store or see our web page “House Sparrows: Deadly Foreign Invaders. $7. Gilbertson style PVC. The research project compared 37 pairs of Gilbertson and PetersonPeople use a variety of devices to prevent predators from raiding nest boxes. On Saturday, April 3, from 1:00 – 2:30 p. The slicker the better. Sell The Birdhouse Chick right! For a round gate pocket, eastern bluebird boxes should be 1 1/2 inched in average and 1 9/16 inches forward mountain and western bluebirds. As a result, its membership rose to 2300. For slotted boxes, no one factor seemed to predict success. Woodlink NABB Audubon Bluebird Houses. Birdhouse Designs. A Well-placed. Galvanized finish or black painted finish are equally okay. nGh With the both in place. Sans the usual cage style which some birds are reluctant to use, it's the 4-sided open desiQuick Tip: Make a spooker so strips of mylar will flutter over the top of the nestbox (Design #2 or #4 recommended). Courtesy Ralph Kiertianis A pair of bluebirds battles with a house sparrow at their nest box. Bluebirds ’ requirements for nesting admit : Reading: Bluebirds FAQs: How to Host Nesting Bluebirds in Your Backyard. Complete Pole Kit. ECO FRIENDLY DIGS Gilbertson Bluebird Cedar Wood Nest Box, Outdoor Nesting Box for Birds, Wooden Bird House, Pole Mount Birdhouse for Outside - Amish Made in USA Visit the ECO FRIENDLY DIGS Store $49. Steve Gilbertson of MN designed his many years ago and found it very successful for attracting bluebirds but. 2. If I had House Sparrow problems, I would go with a Gilbertson PVC. I also used a Gilbertson PVC box one time. When painting boxes use light-colored paint. Left: Julie installing Gilbertson nest boxes throughout the University of Florida campus for the 2014 Eastern Bluebird breeding season. One week later they had completed their nest. Raccoons and Red Squirrels. Roof. 00. But what still needs to be tested is if the Eastern Bluebirds will decide to nest inside the Gilbertson box. Gilbertson’s box traps from Steve Gilbertson, HC 5 Box 31, Atkin, MN 56431, (218. Gilbertson Bluebird Nesting Boxes (1 - 1 of 1 results) Price ($) Any price Under $50 $50 to $100 $100 to $200 Over $200. I usually clear out stick nests, but leave them if there is an actual cup nest. 1 percent of artists who applied for a Scholastic Art Award and they flew him to New York City to attend the award ceremony. Drill at a slight downward angle, going through the front of the house and into the side. 6. 5625" diameter entrance hole. Hanging Box: if you have a spare, replace the dirty box with a clean one. Each of these nest box styles work well for Eastern Bluebirds and they have proven successful at attracting bluebirds in Ohio. Discover (and save!) your own Pins on Pinterest. designed by Steve Gilbertson. In 5 box-pairs only the Gilbertson box was. Discouraging predators and other nest box invaders. Gourd Insert Trap. When the conduit is polished with steel wool, coated with a quality paste wax and buffed smooth, the system is resistant to climbing predators; however, we recommend a baffle for added protection. My husband is holding the Gilbertson nest box while I take a quick photo. PVC will not rot, split or crack, nest box will host many successful broods with its great features: Overhang roof design. People use a variety of devices to prevent predators from raiding nest boxes. 00. The Gilwood represented one to the greatest extremely change in bluebird nestbox design since manmade nesting structures were first erection for Eastern Bluebirds in the 1930s. -----. Boxes that Tree Swallows nest in should have "kerfs" or grooves (saw marks about 3/4" apart) or 1. For hole boxes, temperature and feeding rate affected fledging success. The selected our Gilbertson Nest Box and laid 5 eggs starting on April 2. Sparrow-resistant boxes are criticial to keep out the Bluebird’s deadly nemesis: The House Sparrow!We recommend Slot Boxes or the Gilbertson Nest Box along with dedicated monitoring. Look at their little pin feathers popping out! And already they are showing their true blue colors, with a bit of (dinosaur) green. Placement/installation: Install the guard on the nest box BEFORE the house wren starts using the nest box. The best dimensions for bluebird houses are: Entrance hole: 1. Macrame Jewelry. But until now, it wasn’t clear how well these nest guards worked, said Bailey. This video demonstrating how to mount a Gilbertson Bluebird House. As a result, its membership rose to 2300. If you want to build your own nest box, take a look at the detailed nest box plans that I currently recommend on my website. Designed by Steve Gilbertson, Aitkin, MN This system has become the standard for mounting light to medium weight nestboxes. Handout (PDF) that includes plans for a NABS, Peterson and Gilberston box (Eastern Bluebird) Nestbox Builder - Fred Stille's site with plans for many wood and PVC. Find a NABS Approved bluebird house or PVC and copper bluebird house, cool bluebird homes in wood too Page 2. Since this nest box is made of PVC pipe, which sometimes can deter House Sparrows, you actually have to remove the entire nest box body from the roof in order to look inside. The Gilbertson PVC nest box features a western red cedar or brown poly-wood roof. Recently manufactured and updated, it's constructed of poly-lumber (or recycled plastic) to last a lifetime. Also NABS approved, though unlike a traditional bluebird house, it operates in a different fashion. Drill entrance hole and hole for bird perch. An Eastern Bluebird pair arrived on March 2, 2016. Shop. I sanded the PVC and applied a very thin splatter coat of flat. The supplies can be purchased for a relatively affordable price at most hardware stores. You may know the name for his famous nest boxes, but The Gilbertson bluebird feeder has actually been around for years. This takes a couple minutes. We have used steel pipe for many years and are quite satisfied. They may be moderately effective against squirrels. Garden Birdhouses. Lacomo. 1/8" wire Entry Detail 5/8" 2" 7/8" Remove 2 1/4" dia. I can't wait to. As for the exact nest placement, titmice don’t. Bluebird Houses. House Sparrow Nest in Bluebird Nest Box. 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. Raccoons present a danger to cavity nesting birds. SH- Hummingbird Feeder, The Original One Piece Drip-less Feeder/Silver Hobnail. At the time of organizing back in the 1970s, BBRP was the first state bluebird organization in the nation. More expensive and complicated (need table saw and miter), can be expensive to purchase. Version 1, October 15, 2013Page 1 of 1 Quan Material 21 x 10 (3/4" x 9 1/4") x 9 1/4" long 4 #8 x 1 5/8" exterior wood screws 36"1/8" diameter rod 12 Conduit/Rebar Mounting System 2 x 2 (1 1/2" x 1 1/2") x 2 5/8" long 1/2" EMT Set Screw Connector Install into 3/4" hole in 2x4Gilbertson Universal Sparrow Trap Designed by: Steve Gilbertson, Aitkin, MN. Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. The plastic pipe material and the shallow depth from the entrance hole to the nest box floor. The main components of to system are a 5 footer long section of ½” electrical conduit press a 48” long play of ½” diameter reinforcing bar (or rebar for short). It is thought that the shallow depth of the box, combined with the plastic wall material is not like by sparrows. Recently manufactured and updated, it's constructed of poly-lumber (or recycled plastic) to last a lifetime. Preferred by blues over the years, cool birdhouse mounts quickly and easily on 1/2-inch metal conduit. Diy Bird Feeder. designed by Steve Gilbertson - Aitkin,Mn Drawn by: Fred Stille, Sr. This is not a certain method, since HOSPS will nest in PVC boxes, but they don’t seem to prefer them. Some have even been found to use metal pipes for their nesting site. A GILWOOD BLUEBIRD NEST BOX Assemble the box using wood screws and glue. , +2 more Salt Lake Community College. 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. Lumber/Material: 1 x 10 (top/bottom), 2 x 2 (corner blocks), 2 x 4 (pole mounting block), 1/8" wire or rod. The authors recommend the use of nest boxes with round entrance holes over those with slotted entrances. If the cam is too large for the box, an “attic” or false roof can be. I bought the recommended conduit and voila—the house was up and standing. 19: By early morning, four. Watch ( and listen) for Male Bluebirds, alone on a high branch singing to attract a mate. In researching PVC as an option, I ran into the Gilbertson design but thought it was overly complex and had some risk for dropping the nest-box onto the ground, so I designed my own nest-boxes and put them into use in 2016. . Keith Kridler of TX has had HOSP nest in boxes with an exact 1 3/16" hole. The roof portion is. Cozy Digs for Eastern and Western Blues. The Gilbertson Bluebird Nest Box has a round entrance and a different design of roof as compared to the Gilbertson Box with a slot entrance. Photo Credit: Julie Perreau Research groups members in the Chugach Mountains. There currently is no scientifically-documented way to exclude English Sparrows that works permanently, but some monitors have observed that Gilbertson PVC boxes are often. This system can be easily used on any of the three nest boxes BAN distributes – the Gilbertson PVC, the Troyer, and the Gilwood. 00. com) Entrance holes should be 1 1/2 inches in diameter for Eastern Bluebirds and 1 9/16 inches for Western and Mountain Bluebirds. The week Ben Gilbertson (BBA22/BFA22) graduated high school, he had to fit in a quick trip to Carnegie Hall. We would like to show you a description here but the site won’t allow us. METHOD Nest Box Design and Installation 37 pairs of Gilbertson and Peterson nest boxes were You may know the name for his famous nest boxes, but The Gilbertson bluebird feeder has actually been around for years. Complete nest failure was more common in slot boxes, potentially due to more exposure to the elements. 11 years ago. conduit, 5' long slips over rebar 1/2" conduit coupler Bottom screw replaced with longer screw Ground. Forty-two nest boxes were placed in late Mayon random fence posts and trees with little consideration of habitat needs. Cedar roof. Mar 10, 2022 - Bluebird Houses with side door or Gilbertson Nest Box are best. Can be previously for Eastern Bluebirds, flycatchers, swallows, titmice, chickadees, nuthatches, and wrens. Gilbertson nest box near creek. 5″ (3. And don’t forget to wear your gloves! 2 – Trim a 1/2″ recess that is 3-1/2″ long, two times per the drawing. The 10 boxes were at 4 locations – a 2-Gilbertson box location, a 3-Gilbertson box location, a 3-raised roof box location, and a 2-conventional box location. on a post, a fence line, or any place where birds would like to call home. Front opening, top pivot, flat roof. For further assistance, please use our Contact page. Try not to place the house too close to feeders. . Painting Gilbertson style Bluebird PVC nest boxes using a wood lathe for a birch bark effect. com)Best Nest Box: My all-time favorite nest box for bluebirds is the Nature’s Way model CWH4. The Gilbertson-style nest is well-known for it's well thought out shape. From . from basic nest box to bluebird mansion! Copper Roof Bluebird House 26x8 from $195. head is 3/8” above surface. As well-constructed as some nest boxes might be, they are not immune to ectoparasites, the presence of which can deter some birds from occupying a nest box. This video demonstrating how to mount a Gilbertson Bluebird House. Macrame Bracelet Diy. Your email address will not be published. It uses readily available, affordable materials and is easy to install. nicknackhummer. The supplies can be purchased for a relatively affordable price at most hardware stores. Their sad experience with House Sparrows better prepares them for next spring. Here is the Solution4Patio Description:. Wooden poles are also acceptable and widely used. 75, 5, 5. She and her colleagues conducted the first. I built 20 of these and after putting up many and giving a few to relatives, these extras are for sale. Share with:Tree Swallow nestlings must be able to fly well from the moment they leave the nest in order to fledge successfully. Steve Gilbertson no longer manufactures bluebird products, but you can get this style trap from the Purple Martin Conservation Association for $13. DutchCrafters Gilbertson Bluebird House: $39. The company's filing status is listed as Inactive and its File Number is 9U-850. 269. Holding pattern centered on door and about ¼ inch down from bottom of entrance hole, mark on cross hairs with an awl or sharp nail where the two screws are to go. Gilbertson Nest Box - This unusual design is made from a 4-inch diameter PVC pipe. Steve Gilbertson - Aitkin,Mn Drawn by: Fred Stille, Sr. Gilbertson Nest Box - NABS Approved. High degree of house sparrow resistance while being highly desirable to bluebirds, tree swallows, chickadees and wrens. Bluebirds prefer large expanses of short grass with a clear flight path, ideally facing a field. There is also a great deal of satisfaction from seeing a. House Wren; Tags. Gilbertson. The Gilbertson-style PVC pipe nest box with a 1 1/2 inch round entrance hole (see my pick here) Each of these styles of nest boxes work very well at attracting Eastern Bluebirds. The babies fledged on May 23. Gilbertson boxes, Gilwood boxes, and Troyer boxes (just to name one few) have all demonstrated to be attractive to blooming and lower attractive to house sparrows. These Audubon bluebird birdhouses are simple, well-built, and untreated. The authors recommend the use of nest boxes with round entrance holes over those with slotted entrances. Diesen Gilberston Nest Boxes really enticement Birdies real their secure, warm built allow for many muses to live in these great NABS Approved bluebird boxes. 970 views, 22 likes, 3 loves, 0 comments, 13 shares, Facebook Watch Videos from The Birdhouse Chick: Late winter is a great time to attract bluebirds. Choose North American Bluebird Society (NABS) approved birdhouses to increase chances of successful broods and fledges. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. Conceptual according Stephan Gilbertson of Aitkin MN, which Gilwood has since traditional itself more an favorite with both Bluebirders and the Bluebirds themselves. This was an interesting nesting attempt in that it started out with what appeared to be a house wren dummy stick nest. Why you must shop now for the best birdhouse-feeder gifts, Get the promo code before it expiresThe Gilbertson-style PVC pipe nest box with a 1 1/2 inch round entrance hole (see my pick here) Each of these styles of nest boxes work very well at attracting Eastern Bluebirds. I know I can build them for less and I'm. 50. The PVC nest box is nothing new for Bluebirders. Trials and tribulations with bluebird houses and house sparrows. Bluebirdsprefer a nest box that isnot as deep as the Hill Lake. Bat Houses. Eastern Bluebirds begin defining and defending their nesting territories earlier than other species — generally, starting the end of February, early March. Cart Total: $0. 2 x 5. 00. Bluebirds can be found in the Adirondacks and are attracted by some open grassland such as a yard and a nest box or two. Have any of you used a Gilbertson PVC Bluebird Nest Box? From what I can find on the internet they are supposed to be about the best you can get, I have never seen any of them for sale except on the internet and the are kind of high priced. Loading. g. Trap works on both wood and pvc boxes. Here is the Solution4Patio Description:. In particular, the PVC Gilbertson nest box, Troyer nest box, and Gilwood designs have gotten encouraging results. (wood block). Do you want to build a nest box or have one already? Find plans and helpful tips! Features. , 6 nestlings) as they may lean against the front. Get Gilbertson Nest Box’s (gilbertsonnestbox. The entrance to the nesting box should be about 5-6 feet above the ground. (I recommend mounting boxes on smooth metal pipe with a wobbling stovepipe baffle,. Teacup Bird Feeders. . side of box Paint inside dark color Secure bottom with 2 screws 2x2x71/2" 9" 71/2" Screws # 8 x 1" - Truss or (washer head sheet metal screw) 3/4" hole 1/8" hole Gilbertson PVC Nest Box with Conduit/Rebar Mounting System Bottom screw replaced with longer screw Drip edge Screw to keep box from turning on conduit Recent research using NestWatch data suggests that, on average, nests in boxes with predator guards had success rates 6. Pinterest. The size of the entrance hole can be adjusted from 1¼ to 1 3/8. Another popular style of nest box is the Gilbertson Bluebird House, which is made of thin PVC pipe. The last fledglings will be gone by October. A 2x2 (1 1/2" x 1 1/2") is installed on the back of the nestbox (1 1/2" minimum rear roof overhang is required). Step 1: - Prepare box for installation -. nest-box model if presented with choices. Building bluebird nest boxes is a great way to help conserve birds at the local level. The Gilbertson feeder was designed by Steve Gilbertson of Minnesota. At this point, the Gilbertson box, which is 4" in diameter, is quite crowded. But what still needs to be tested is if the Eastern Bluebirds will decide to nest inside the Gilbertson box. Thank you David. Steve Gilbertson no longer manufactures bluebird products, but you can get this style trap from the Purple Martin Conservation Association for $13. Measures 8" by 9" by 12". Keep House Sparrows out of nest boxes!! This is critical to a Bluebird’s nesting success!! We recommend Slot Boxes or the Gilbertson Nest Box for this purpose. 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. Consider using a PVC-style bluebird house, like the “Gilbertson” nest box My “Gilbertson” nest box in mid-winter. Consider using a PVC-style bluebird house, like the “Gilbertson” nest box. The entrance to the nesting box should be about 5-6 feet above the ground. Sans the usual cage style which some birds are reluctant to use, it's the 4-sided open desi One 1 x 10 x 11″ (roof) Four 1 x 6 x 10″ (front, sides, and back) Two 1 x 6 x 4″ (floor and inner roof) One 2 x 2 x 9″ (pole-mounting block) The entry hole should be 1 9/16″ (optimum size) or 1 1/2″ in diameter. The Peterson nest box may not be the best type to use in hotter climates. House Sparrows can fit through entrance holes as small as 1 1/4”; therefore, most cavity-nesting songbirds using nest boxes are vulnerable to House Sparrow competition. 99: PVC pipe, sparrow-resistant, top-opening, small: Amazon: Average Price $32. This style of nest box is made from PVC drain pipe that is about 4-5 inches in diameter, and is topped with a wooden roof. Wood Birdhouses. The roof designs are invertedNesting Habits of the Tufted Titmouse. . Certainly many thousands of birds have. Loading. Gilbertson nest box with Vern's Clydesdale mare, Doll. by Backyard Bird Lover at Amazon. Materials: CONDUIT: Use 1/2-inch EMT electrical conduit (available in 10-foot lengths). You can also watch this video that we produced to go along with our curriculum Thinking Outside the (Nest) Box for middle school students, which walks you though the same instructions. Simple to monitor, just squeeze the top of house with both hands to elongate and release the birdhouse part. If I bought ONE box for Eastern bluebirds, it would probably be a Gilwood (which they seem to prefer in my experience) or maybe a Troyer (a box used successfully by Bluebirds Across Nebraska - see info). out-buildings, etc. long Polish with steel wool and apply wax 1/2" rebar 4 - 5 ft longCommon Nesting Birds See Now. #3. For more information on this bird house please see Amazon link below: The Peterson has worked wonderfully to house bluebirds for many years. Saw cuts. An experimental front. When autocomplete results are available use up and down arrows to review and enter to select. Floors not smaller than 5″ x 5″. Instructions: How to Deter House Sparrows from Your Bluebird Nest Box with Monofilament Fishing Line. . Gilbertson Bluebird Nest Box in PVC-NABS Approved. Eastern Bluebird babies in a Gilbertson nest box. 50. IMPROVED Troyer-Haskell Troyer Tunnel Trap. g. Mountain Bluebird s need a 1 9/16" hole), ventilation, drainage holes, and make it. ⭐⭐⭐⭐⭐ 5 star review from Bruce L. " I currently have two bluebird boxes that are being claimed by one house sparrow pair. Drill 5/8" vent holes 1" down from the top and 2" in. Probably the most commonly used are NABS, Peterson, Slot, and Gilbertson. Gilbertson PVC Box. d. That is the short and sweet answer for where to place a. The most important thing is to know what kid of birds you want to attract and provide boxes that meet that specific bird'd requirements. Visit. Size: 5. Loading. That’s the short. We strongly believe in diversity, equity and inclusion of all without regard to race, color, sexual. designed by Steve Gilbertson - Aitkin,Mn Drawn by: Fred Stille, Sr. If you want to build your own nest box,. 8cm) diameter. Woodlink NABB Audubon Bluebird Houses. Nest boxes provide cavity-nesting species the option to choose among several nest sites. Avoid gourds hung on trees: House Wrens seem to be. These are inverted roof designs in positions of natural assembly. 8 Wide X 13 Deep X 22 High. 0, Nov 11, 2015Page 1 of 1 1/8" dia. For more on this, ask us at the store or see our web page “House Sparrows: Deadly Foreign Invaders. 5-2" wide x 6" long plastic screen (gutter guard) stapled tightly inside below the entrance hole to enable fledglings to exit. One style of bluebird box that has proven to be very successful in mid-Missouri is the Gilwood nest box (Figure 4). Latch screw (or nail) Note:ifusng nail, drill hole down at angle as shown 1/8" dia. Front View. Oval Universal Sparrow Trap. The Amish Gilbertson Bluebird House has a round birch-like log bottom and a strong squared top made of eco friendly poly (recycled plastic). A GILWOOD BLUEBIRD NEST BOX Assemble the box using wood screws and glue. The mounting block for the gilbertson pole system is installed on the back of the xbox with two exterior deck screws (2”). In the study of de la Hera et al. A House Wren constructs a nest in a Gilbertson-style nest box in my backyard. 2 x 5. The Rural King sells this styrofoam type Nest box for bluebirds I converted it to a Gilbertson Style. Use duct tape along the top to. 1. (2013), nest-box. An main components of the system exist a 5 foot long section of ½” electrical line and a 48” length piece of ½” diameter reinforcing bar (or rebar for short). Explore. DIY Simple easy PVC bluebird and tree swallow nesting box. 3) Mark’s Bird House With Hole Guard. Probably the most commonly used are NABS, Peterson, Slot, and Gilbertson. Wednesday, November 15, 2023. Eastern, Western & Mountain Bluebirds. There are 2 nest boxes wherein the vent holes are drilled, cutting the PVC pipe, thus producing these nest. Birdhouse Ideas. Birdhouse Art Poles 6 ft. The ideal size for a round entrance hole is 1-9/16 inch. Birch-like log base. Another great option is vinyl because it's mold and bacteria resistant, and unlike wood, PVC/Vinyl material lasts a lifetime. 8267; Nestbox Builder - Fred Stille makes HIGH QUALITY standard NABS style boxes, X-boxes and a Gilwoods, and custom designs. Red squirrels can enlarge the hole of the bluebird house and even take up residence if able to get inside. It was called the Gilwood box. The box design is supposed to deter English sparrows, while the metal pipe keeps many predators from climbing up into the box. A Bluebird’s diet consists mostly of insects and berries, with a balance of around 2/3 insects and 1/3 berries. The shape is definitely similar, although the birch appearance is much more aesthetic. This is very attractive to the Bluebird species! SPARROW RESISTANT Sparrows are a chief competitor to many birds. Bed & Breakfast by Troyer Martin Feeder. Michigan Bluebird Society's problem solving guide for Bluebird Nest boxes including how to trap house sparrows, keep predators out of the house, and solving ins. Keep wrens busy by removing their “dummy nests”. Below we have included free bluebird house plans, a simple one-board box that's relatively easy to build. Shop The Birdhouse Chick today!Noel guards protect nest boxes from raccoons, opossums, cats and birds of prey. Use a sheet that is about 32 inches tall, and a width that will allow the sheet to wrap entirely around the trunk. Materials Needed to Build this Blue Bird Nest Box . The wrens loved the Gilbertson box, which is why I think I’m going to get one again and let them use it to build their dummy nests. and never lay any eggs in it? My husband and I spy a male and female bluebird couple hanging around our one Gilbertson 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. "easyto build"nest box pattern was selected. Houses with front or side doors or the Gilbertson Nest Box are recommended for easy monitoring and nest removal. Use universal trap. Entrance holes centered about 7″ above floors. The selected our Gilbertson Nest Box and laid 5 eggs starting on April 2. Cut the top piece of the nest box, 11 1/4" x 11". The best nest boxes to use for bluebirds in Ohio are (1) a wooden nest box with a 1 1/2 inch round entrance hole, or (2) a Gilbertson-style PVC pipe nest box with a 1 1/2 inch round entrance hole. 1. There are several ways to discourage them from using nest boxes, ranging from boxes specifically designed to dissuade sparrows to traps to eliminate them. The Bluebird Recovery Program of Minnesota (BBRP), recommended boxes include the Gilbertson PVC, Gilwood, and the Peterson. Where. Made from waste 4" PVC pipe. Oct 30, 2012 - 2020 holiday shipping is no laughing matter. Nicely constructed and very easy to install. You remain in front of the best choice of Gilbertson Pvc Boxes items with house distribution that you can discover on the internet.