I'm getting ready to order the Gilbertson PVC box and also the Gilbertson Universal Trap. Repeating Bait Ground Trap. I monitor blue bird. 99: PVC pipe, sparrow-resistant, top-opening, small: Amazon: Average Price $32. Complete nest failure was more common in slot boxes, potentially due to more exposure to the elements. Bluebirds are very tolerant of human presence. One has vent covers. The Amish Gilbertson Bluebird House has a round birch-like log bottom and a strong squared top made of eco friendly poly (recycled plastic). Gilbertson Bluebird Cedar Wood Nest Box . Aug 14, 2016 - These Gilberston Nest Boxes really entice Bluebirds and their secure, warm construction allow for many broods to live in these great NABS Approved bluebird boxes. 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. Download plan: 170kb. What is a Gilbertson nest box? The Gilbertson PVC nestbox is made from white 4-inch- diameter PVC sewer and drain (S&D) pipe 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. The Birdhouse Chick. Wednesday, November 15, 2023. The Gilwood andBluebirds prefer to nest in open areas with low or sparse ground cover. Find a NABS Approved bluebird house or PVC and copper bluebird house, cool bluebird homes in wood too. Some Bluebirds, paired with last year’s mate, may also be getting a quicker start!House Sparrows tend to like them for whatever reason – so ditch the perch to get rid of House Sparrows. The Gilwood andNesting Box Selection Both box types were selected equally (Table 1). Preferred by blues over the years, cool birdhouse mounts quickly and easily on 1/2-inch. 8 years ago. Visit. Bluebirds prefer large expanses of short grass with a clear flight path, ideally facing a field. Cozy Digs for Eastern and Western Blues. The supplies can be purchased for a relatively affordable price at most hardware stores. Enjoy the outdoors and help your local Bluebird population by providing a nesting box in your yard. Here is the Solution4Patio Description:. Sep 25, 2016 - Free nest box plans for Bluebirds and other small cavity-nesters. nicknackhummer. Drill 5/8" vent holes 1" down from the top and 2" in. Mountain Bluebird s need a 1 9/16" hole), ventilation, drainage holes, and make it. 5″ (3. A Well-placed Nest Box2009 has been an interesting, to say the least, year for bird watching in my yard. Jan 11, 2020 - Discover (and save!) your own Pins on Pinterest. ⭐⭐⭐⭐⭐ 5 star review from Gil B. 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. Macrame Bracelet Diy. Other products in the Traps category. Woodlink NABB Audubon Bluebird Houses. Consider using a PVC-style bluebird house, like the “Gilbertson” nest box. Have also used NABS style boxes, wren house. back yard; building nest; Gilbertson; Nest Box; Sticks; Virginia; wren; 10 like. Sit Back and Enjoy Bird Watching From the Comfort of Your Own Backyard ; Nest View: Remove the Base to View into the Nesting Box. Drill two 1/4" ventilation holes in the side panels of the box. The design of these nest boxes makes it difficult for. Yes, yes! The very best quality and the best price are here, promise!. That is the short and sweet answer for where to place a. T14 Purple Martin Bird House. to the ground (e. Keep wrens busy by removing their “dummy nests”. DIY Simple easy PVC bluebird and tree swallow nesting box. 90 $49. 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. Photo Credit: Christina RinasThis should be done at the beginning of the nesting season. If sparrows do take up residence, one option is to relocate the box to a site farther away from human occupation. If placing new boxes, be sure they face the openness of a yard, meadow or field. October 9, 2012 / Dubbed “the Gilbertson Nest Box” it might just resemble a coffee can at first glimpse. Designed for Gilbertson conduit/rebar mounting system, although other mounting methods may be used. Either a Stovepipe (Kingston) or PVC wobbling baffle will guard your nestbox against climbing predators like raccoons and cats. 3) The Right Nest Boxes. Shop The Birdhouse Chick today!Gilbertson Nest Box Mounting System Steve Gilbertson has developed a very simple, effective, and inexpensive assembly system such works for most light to medium weight lair boxes. Face the box away from prevailing winds. Develop by Steve Gilbertson of Aitkin MN, the Gilwood has because established itself as a favorite with both Bluebirders and the Bluebirds themselves. It is inexpensive and useful for boxes mounted on trees and wooden posts that offer easy access to climbing predators. Instructions for assembling the box. We have used steel pipe for many years and are quite satisfied. Why would bluebirds build a nest. Below we have included free bluebird house plans, a simple one-board box that's relatively easy to build. IMPROVED Troyer-Haskell Troyer Tunnel Trap. Each of these nest box styles work well for Eastern Bluebirds and they have proven successful at attracting bluebirds in Ohio. Your email address will not be published. Each features a 1. #4. Select a durable, waterproof nest box. Designed according Steve Gilbertson are Aitkin MN, the Gilwood has since established itself as a favorite with both Bluebirders and the Bluebirds i. 10:. All boxes should be installed. At the time of organizing back in the 1970s, BBRP was the first state bluebird organization in the nation. Keith Kridler of TX has seen increased use of regular boxes when he puts an empty Campbell's soup can inside that chickadees can build their. Apply a bead (line) of all-purpose low Voc caulk to the top of the inner roof prior to installing the exterior roof. Get Current Price. A GILWOOD BLUEBIRD NEST BOX Assemble the box using wood screws and glue. If you make your own nestbox, use PVC or unpainted, untreated 3/4" - 1" wood, put on an overhanging (2-5" overhang) roof (a shallow saw kerf (groove) will keep rain from soaking into box), no perch, a round 1 1/2 " diameter hole (or 1. One great part of this system is it provides an easy solution to the problem of how to support a nest box in the ground and keep it stable and straight. 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. Building bluebird nest boxes is a great way to help conserve birds at the local level. 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. This enhanced Gilbertson style Eastern Bluebird nest is a favorite of bluebirds and features a 4" diameter PVC nesting chamber. Over the course of about six days, the Tufted Titmouse pair will build a cup-shaped nest inside a tree cavity. Dec 31, 2012 - These Gilberston Nest Boxes really entice Bluebirds and their secure, warm construction allow for many broods to live in these great NABS Approved bluebird boxes. A house with side door makes for easy monitoring, as does the famous Gilbertson Nest Box. 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. It is a very simple-to-build feeder that almost anyone with basic woodworking skills can make. , 3 feet). 99. See Comparing Pros and Cons of Various Predator Guard Styles. 5 bluebird bird houses nest box cedar peterson oval. Sometimes these birds opt for man-made nest sites and adopt nest boxes. Young of open-nesting songbirds often leave their nests as early as day 12-14. This is how to do a nest check on the Gilbertson Bluebird house. We would like to show you a description here but the site won’t allow us. Raccoons and Red Squirrels. I didn’t put up a nest box for several years until last year when I used the WBU. A wren guard is a small barrier or hood -like structure that blocks the vision of a birdhouse entry hole. T-14 House Nest Trays; T-14 House Parts & Accessories; Traps. For more on this, ask us at the store or see our web page “House Sparrows: Deadly Foreign Invaders. 2x2 Pole Mounting Block. Red squirrels can enlarge the hole of the bluebird house and even take up residence if able to get inside. Feb 16, 2020 - These Gilberston Nest Boxes really entice Bluebirds and their secure, warm construction allow for many broods to live in these great NABS Approved bluebird boxes. Steve Gilbertson of MN designed his many years ago and found it very successful for attracting bluebirds but. A PVC-style bluebird house, such as the “Gilbertson” nest box, is recommended to deter starlings. Painting Gilbertson style Bluebird PVC nest boxes using a wood lathe for a birch bark effect. Right Bird, Right House Interactive;. Features: The entrance hole size is 1-½" Depth of the compartment is 6-¾" width is 4"How to Do It: Acetate sheets can help prevent snakes from accessing tree-mounted nest boxes. The Gilbertson PVC nest box features a western red cedar or brown poly-wood roof. The authors recommend the use of nest boxes with round entrance holes over those with slotted entrances. This system can be easily used on any of the three nest boxes BAN distributes – the Gilbertson PVC, the Troyer, and the Gilwood. 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 interiors of light-colored boxes stay cooler than dark-colored boxes. Bluebird Nestbox Version 2, June 19, 2011Page 1 of 1 Roof Front/Door Side Floor Back Pivot screw (each side) Apply caulk to top of sides and to top of back before attaching roof. $21. Made in. . The supplies can be purchased for a relatively affordable price at most hardware stores. Since this article is finally being published (in September)- The Henderson's did see swallow babies fledge from the Gilbertson. Small Business Owner at Gilbertson Nest Box Co Osseo, MN. You all just helped me in the post "Best Nesting Box To Discourage House Sparrows. 00 Copper Roof Birdhouse 28x10-Patina $295. 0, Sept 8, 2011Page 1 of 1 1/2" EMT Coupling Longer screw at bottom 1/2" EMT Conduit 5 ft. Share. Find more info on AllPeople about Gilbertson Steve and Texaco-Distributor Of Willmar, as well as people who work for similar businesses nearby, colleagues for other branches, and more. 90 / Count) The Gilbertson-nesting birds produced more, higher quality young, suggesting that an inappropriate box design could compromise fitness of parents and offspring, therefore box designs should be. Cut the two side pieces. : "Blue bird house - Just put the houses up and waiting for the blue birds to begin building their nest. Sep 25, 2016 - Free nest box plans for Bluebirds and other small cavity-nesters. "easyto build"nest box pattern was selected. The selected our Gilbertson Nest Box and laid 5 eggs starting on April 2. Birds feeding on a feeder array near the Gilbertson distracted the bluebirds from building their nest. Watch. Animals. This unusual, wedge-shaped box is smaller than most bluebird boxes. 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. It needs to face the right way. The Birdhouse Chick. Find more bird houses plans or discover more bird houses and bird feeders. Bluebirdsprefer a nest box that isnot as deep as the Hill Lake. 4 x 13 inches. Peterson) the floor area is calculated at 2 1/2" below bottom of entry. Gilbertson PVC Nest Box. (Note: some. Modified Gilbertson PVC. Two slots across rear underside of roof keep water from dripping on back of box. 2009 has been an interesting, to say the least, year for bird watching in my yard. . Cozy Digs for Eastern and Western Blues. 269. Complete Pole Kit. Sans the usual cage style which some birds are reluctant to use, it's the 4-sided open desiAn Eastern Bluebird pair arrived on March 2, 2016. 4. g. Steve Gilbertson - Aitkin,Mn Drawn by: Fred Stille, Sr. Modern Birdhouses. PVC Pipe: Length 10in (25cm) | Diameter 4in (10cm) PVC Female adapter Wooden dowel for perch: Length 1. Abundant Food – Please do not use pesticides and deprive Bluebirds of. Shop The Birdhouse Chick today!Dec 31, 2012 - These Gilberston Nest Boxes really entice Bluebirds and their secure, warm construction allow for many broods to live in these great NABS Approved bluebird boxes. 3. See full list on bbrp. The data came from NestWatch, a citizen science. At this point, the Gilbertson box, which is 4" in diameter, is quite crowded. Instructions: How to Deter House Sparrows from Your Bluebird Nest Box with Monofilament Fishing Line. 50. Make sure it is mounted 5 to 10 feet off the ground. As a result, its membership rose to 2300. Bluebird Nest Box. Take the dirty one home, dump the contents, hose it down, scrub and rinse. Michigan Bluebird Society NESTBOX PLANS Building nest boxes is a fun, relaxing activity that can also save you money. NABS Fact Sheets & Plans. . nest-box model if presented with choices. 95. Nests Near Humans. . 3. Come May or after I will have a better idea when I see which bird might try to use bluebird house or not. 3cm) Loading. Conceptual according Stephan Gilbertson of Aitkin MN, which Gilwood has since traditional itself more an favorite with both Bluebirders and the Bluebirds themselves. See our page on bluebird nesting boxes for more information on these designs. Should I order two boxes, or once I. 7% higher than nests in boxes without guards. The Gilbertson feeder was designed by Steve Gilbertson of Minnesota. English Sparrows prefer a lot of headroom to build their messy high dome-shaped nests and tend to avoid Gilbertson nest boxes because they have almost no headroom. The wooden fence post does not exclude predators. Boxes placed in or around residential areas are likely to be claimed by House Sparrows. 375" x 2. However, there is a great “sparrow-resistant” nest box that a lot of folks have success with called the Gilbertson-style nest box. Jewelry Crafts. The PVC (Gilbertson) nestbox is a unique design. Dec 29, 2020 - These Gilberston Nest Boxes really entice Bluebirds and their secure, warm construction allow for many broods to live in these great NABS Approved bluebird boxes. House Wrens. F30 Nestbox Plan PDF– Ideal for Western/Mountain Bluebirds (Nestboxbuilder. Boxes should face open spaces, the edge of woods is ok. What is a gilwood box? The Gilwood Bluebird Nest Box represents one of the most radical changes in bluebird nest box design since manmade nesting. Find a NABS Approved bluebird house or PVC and copper bluebird house, cool bluebird homes in wood too Page 3. You all just helped me in the post "Best Nesting Box To Discourage House Sparrows. (wood block). With only 1. Artisan's unique birdhouse boutique 866. Their preferred food source is insects, as these provide the necessary proteins to lay eggs and raise young. I'm getting ready to order the Gilbertson PVC box and also the Gilbertson Universal Trap. . Look at their little pin feathers popping out! And already they are showing their true blue colors, with a bit of (dinosaur) green. A Bluebird’s diet consists mostly of insects and berries, with a balance of around 2/3 insects and 1/3 berries. The Peterson nest box may not be the best type to use in hotter climates. 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 PVC nest box is nothing new for Bluebirders. These boxes typically have two nests per year, but can have up to 3. The runt is on the bottom of the pig pile. Note the predrilled 3/4” hole on the mounting block. And they are not at all effective against snakes, chipmunks or competing. Materials Needed to Build this Blue Bird Nest Box . $32. For example, the Gilbertson Bluebird House uses PVC pipe, a cylinder-shaped nest box, and a smaller nesting cavity to discourage house sparrows. BLUEBIRDS! Bluebirds are Choosing Nesting Sites, NOW! Most people don't realize that⭐ ⭐ ⭐ ⭐ ⭐ 5 star review from Morris W. Nests are padded with hair, fur, string and other soft material. Bluebirds Across Nebraska believes the Gilbertson conduit/rebar mounting system is the best system available for mounting a lightweight bluebird box. The roof designs are inverted As for the exact nest placement, titmice don’t seem to be very choosy. Fill out the requested information. Bird House Feeder. Bluebird Nestbox Version 1. If you are trying to attract Bluebirds in an area where HOSPS are known to be a problem, you might try starting with a PVC nestbox instead of a wooden one. However, I did see a House Wren dummy nest in a Zuern tree branch box. Oct 30, 2012 - 2020 holiday shipping is no laughing matter. 00. Western and Mountain Bluebirds typically stay in the nest longer than Eastern Bluebirds - 22-23 days, depending on the weather. 5-2" wide x 6" long plastic screen (gutter guard) stapled tightly inside below the entrance hole to enable fledglings to exit. , in the late ‘80’s. . 00. A Gilbertson nestbox is made out of a PVC tube. PVC is weather resistant, so the boxes will last a long time with minimal maintenance. Oct 30, 2012 - 2020 holiday shipping is no laughing matter. Made from waste 4" PVC pipe. floor, this box is ideal for larger cavity nesters such as Western and Mountain Bluebirds. This nest had moss and leaves and bark strips that I do not usually see with house wrens. Nest Box Pole Option 1: Steel Pipe. Bluebird nest boxes are most successful when placed on a post or pole, in an open area, about 4' to 5' high. g. I live in Minnesota. Another pioneer in bluebird trails is Steve Gilbertson of Aitkin MN who developed the Gilwood wood nest box and the Gilbertson PVC nest box. 3) Mark’s Bird House With Hole Guard. There currently is no scientifically-documented way to exclude House Sparrows that works permanently, but some monitors have observed that Gilbertson PVC boxes are often. Standing the test of time, bluebirds will return to these fine digs year after year should fledges be successful. 5) Eastern or Western Bluebird Nestbox Plan. They should be 6 1/2" across; the rear edge should be 12 1/4" top to bottom, and the front edge, 10 3/4". 1. Shop The Birdhouse Chick today!Noel guards protect nest boxes from raccoons, opossums, cats and birds of prey. At the time of organizing back in the 1970s, BBRP was the first state bluebird organization in the nation. Material needed: 1/2″ interior diameter steel pipe cut to 8-1/2′ lengths. Can be previously for Eastern Bluebirds, flycatchers, swallows, titmice, chickadees, nuthatches, and wrens. $7. Bluebird boxes are often pole mounted. Designed by Steve Gilbertson of Aitkin MAN, the Gilwood has since established itself how a favorite equal both Bluebirders and the Bluebirds themselves. Wednesday, November 15, 2023. Species. Church Birdhouse Vinyl/PVC $279. d. The idea is to place the pins or. You all just helped me in the post "Best Nesting Box To Discourage House Sparrows. A 1. 4) Nestbox Plans. Gilbertson. Gilbertson Universal Sparrow Trap Installed inside box just below entry. 23/32” hole X 1 3⁄4” deep through wood block, center as shown, do not penetrate roof (pole conduit attachment) Body of screws 4 1/8” apart, K-Lathe. Position boxes in open areas at least a hundred yards apart. . Three weeks after putting up the Gilbertson nest. 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. Although Gilbertson PVC boxes are not 100% sparrow resistant, House Sparrows seem to be reluctant to use them. Gnome House. 3) The Right Nest Boxes. There is also a great deal of satisfaction from seeing a. The ideal size for a round entrance hole is 1-9/16 inch. 00. When door is opened eggs/nestlings may tumble out if nest and box are tilted or when box is crowded (e. Replacement Plexiglass Window. A House Wren constructs a nest in a Gilbertson-style nest box in my backyard. 11 years ago. Boxes that Tree Swallows nest in should have "kerfs" or grooves (saw marks about 3/4" apart) or 1. Some birdhouse landlords share that they use pellet guns to eliminate house sparrows. This nest box has a unique entrance design; the size of the hole can be adjusted from 1-1/4 inch to 1-3/8 inch by simply bending the wire running through the box. designed by Steve Gilbertson. I’ve always used the nest boxes from WBU with the v-shaped roof. 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. 5 – 3″ between the guard and the nest box entrance hole. In April I added a Gilbertson nest box, which was designed for Bluebirds, but accommodates other cavity nesters such as Tree Swallows, Black-capped and Carolina Chickadees, Tufted Titmice, House Sparrows and House Wrens, to name a few. Shop The Birdhouse Chick today!First, check that the cam is working before you install it in the box! Most cameras can be mounted to the underside of the nest box roof with a few screws. Take a peek at eggs or. Dec 27, 2020 - Discover (and save!) your own Pins on Pinterest. . 6) DANDR Nestbox Plan. Garden Bird Feeders. We strongly believe in diversity, equity and inclusion of all without regard to race, color, sexual. Another pioneer in bluebird trails is Steve Gilbertson of Aitkin MN who developed the Gilwood wood nest box and the Gilbertson PVC nest box. Why you must shop now for the best birdhouse-feeder gifts, Get the promo code before it expiresReally Popoular Bluebird Houses~The Gilbertson. Gilbertson PVC Bluebird Nest Box PDF (Nestboxbuilder. , the Visitor Interpretive Center at Newcomb will host a Family Bluebird Nest Box Workshop. $3. 90 $ 49 . The best dimensions for bluebird houses are: Entrance hole: 1. 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. that promotes the recovery of bluebirds and other native cavity-nesting bird species in North America. An Eastern Bluebird pair arrived on March 2, 2016. 95 +S&H. This is very attractive to the Bluebird species! SPARROW RESISTANT Sparrows are a chief competitor to many birds. Gilbertson Trap – This trap works on any style box and has a small piece of metal measuring tape that springs shut to close off the hole to the box and trap the HOSP. The PVC nest box is nothing new for Bluebirders. 630. These are inverted roof designs in positions of natural assembly. Now with optional poly-lumber matching roof. Explore. But, more recent research has been pointing to the fact that boxes with smaller nesting spaces in them seem to be less desirable to sparrows. I built 20 of these and after putting up many and giving a few to relatives, these extras are for sale. Wooden poles are also acceptable and widely used. Also NABS approved, though unlike a traditional bluebird house, it operates in a different fashion. And while all types of guards were correlated with improved nesting success, birds nesting in boxes with cone-type baffles, stovepipe baffles, or entrance hole extenders (also. There are a lot of different bluebird nest box designs out there and choosing can be very difficult. Raccoons and Red Squirrels. Category. Box height varies depending on drop selected (entry to floor distance). This video demonstrating how to mount a Gilbertson Bluebird House. The Missouri Bluebird Society is a 501 (c) 3 not- for- profit organization dedicated to conservation of bluebirds and other native cavity nesting songbirds, and to educational projects that would be of benefit to these native birds. Simply drive a 3/4-inch piece of electrical conduit into the ground and attach the. nGh With the both in place. Galvanized finish or black painted finish are equally okay. This front-door bluebird abode. If I had House Sparrow problems, I would go with a Gilbertson PVC. I usually clear out stick nests, but leave them if there is an actual cup nest. Metal globe hanger with glass dish feeder allow for a variety of treats; fruit, jelly, meal worms, peanuts, suet, or seed. Shop The Birdhouse Chick today!Installing Nest Box Excluders: Nest box excluders are accessories that prevent starlings from entering or taking over the bluebird box, allowing only bluebirds to utilize it. Insert the nail to hold the side door closed. Recently manufactured and updated, it's constructed of poly-lumber (or recycled plastic) to last a lifetime. House Wrens may also be attracted to Gilwood boxes, which have a larger opening. S&S Controller Repeating Nest Box Trap. Steve Gilbertson of MN designed his many years ago and found it very successful for attracting bluebirds but. Gilbertson PVC Box. It will also deter squirrels, chipmunks, mice, and rats as long as they cannot otherwise jump to the box. Sit Back and Enjoy Bird Watching From the Comfort of Your Own. Trap works on both wood and pvc boxes. Use wren guards on active bluebird houses. Cut the. I clean out my Gilbertson boxes after each brood and drop them in a 10% bleach. Our first bluebird nest. This new box incorporated a (2x2) board across the back of the roof (similar to the Gilbertson PVC nestbox). Tested the effects of nest box preference and temperate on breeding success of Eastern Bluebirds on the University of Florida campus as a means to influence nest box management in positive ways. High degree of house sparrow resistance while being highly desirable to bluebirds, tree swallows, chickadees and wrens. Roof. The company's principal. 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. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. ⭐⭐⭐⭐⭐ 5 star review from Curtis M. It has so many features that I love. (2013), nest-box. The box design is supposed to deter English sparrows, while the metal pipe keeps many predators from climbing up into the box. The shape is definitely similar, although the birch appearance is much more aesthetic. Providing supplemental food can fool breeding birds into. Sit Back and Enjoy Bird Watching From the. Gilbertson Bluebird Nest Box in PVC-NABS Approved. 15. Check out our gilbertson nest box selection for the very best in unique or custom, handmade pieces from our feeders & birdhouses shops. However, I did see a House Wren dummy nest in a Zuern tree branch box. out-buildings, etc.