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. nGh With the both in place. Birdhouse Projects. 5) Eastern or Western Bluebird Nestbox Plan. the base of the box (See image 4). Don’t put your feeder too close to a bluebird nest box to keep predators away (100 feet is a minimum recommendation) Don’t supply feeders during summer months when the weather is nice and birds can forage on their own. g. BirdInformer BESTSELLER # 2. 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. 8 Wide X 13 Deep X 22 High. Contact info: [email protected]" oval hole. That’s the short. If the cam is too large for the box, an “attic” or false roof can be. make sure you have your house up and ready. Use a sheet that is about 32 inches tall, and a width that will allow the sheet to wrap entirely around the trunk. The Gilwood nest box looks like a more traditional nest box made of wood, but it has an interesting oval-shaped hole that acts as the main sparrow-resistant feature of this bluebird house. Use Sparrow-resistant boxes. by Fred Stille and Steve Gilbertson. designed by Steve Gilbertson. Includes the Gilbertson pole system - 1/2” x 5’ galvanized metal conduit, 1/2” x 4’ steel rebar (for stake), and one conduit coupler. . An Eastern Bluebird pair arrived on March 2, 2016. SH- Hummingbird Feeder, The Original One Piece Drip-less Feeder/Silver Hobnail. Gilbertson boxes are used by birds starting in April. A Safe, Sparrow-resistant 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. Garden Birdhouses. Gilbertson PVC Bluebird Nest Box. Either a Stovepipe (Kingston) or PVC wobbling baffle will guard your nestbox against climbing predators like raccoons and cats. 375" x 2. (1/2" space over door). floor, this box is ideal for larger cavity nesters such as Western and Mountain Bluebirds. 2 models available. The best nest boxes to use for bluebirds in Indiana 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. Material needed: 1/2″ interior diameter steel pipe cut to 8-1/2′ lengths. PVC Box Hook Rear View (unarmed) Front View (armed) 12" 13/8" x 1 1/4" x 2 1/2" hardwood block 12-gauge wire (or coathanger wire) 3 1/2"Section of retractable tape measure 1Electrical tape Quan MaterialFound 13 colleagues at Electramatic. 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. Box height varies depending on drop selected (entry to floor distance). All boxes should be installed. Julie used two popular nest box models, the Gilbertson model and a more traditional Peterson model and paired them 80 meters apart, throughout the. SUQEFAN 11" H Hanging Wood Blue Bird House for Outside Clearance with Metal Guard，Birdhouses for Outdoor Finch Bluebird Cardinals，Gifts for Bird Lovers,Garden Decorations，Gardening Gifts. Position boxes in open areas at least a hundred yards apart. Drill the bird entrance hole using a forsnter drill bit. A Bluebird’s diet consists mostly of insects and berries, with a balance of around 2/3 insects and 1/3 berries. Squirrel Feeders. Keeping house sparrows out of nest boxes is part of being a responsible bird landlord. Side Side Back Front Roof Pole mounting block Inner Roof Note: Apply caulking before installing main roof Floor Pivot Screws Latch screw (or nail) Note: if usi ng nail, drill hole downt at angle as shown Use 1 1/4" Screws to attach roof to inner roof 2" Screw Through. Garden Bird Feeders. out-buildings, etc. Gilbertson Hanging Bluebird Feeder. This birdhouse (nest box) is made using a piece of wood and PVC pipe. Saw cuts. For slotted boxes, no one factor seemed to predict success. A Safe, Sparrow-resistant 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. These are inverted roof designs in positions of natural assembly. Designed by Steve Gilbertson, Aitkin, MN This system has become the standard for mounting light to medium weight nestboxes. 630. House Wrens may also be attracted to Gilwood boxes, which have a larger opening. Monitor your bird houses regularly to remove House Sparrow nests. 7) Gilbertson Bluebird 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. "easyto build"nest box pattern was selected. 5 bluebird bird houses nest box cedar peterson oval. g. No matter what design you use all Tree Swallow boxes should have: Sturdy wood construction using 1″ rough-cut boards or plywood (exterior-grade only) no less than 1/2″ thick, preferably thicker. so little time! READ MORE. Use wren guards on active bluebird houses. Replacement Plexiglass Window. Sans the usual cage style which some birds are reluctant to use, it's the 4-sided open desiOne 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. We strongly believe in diversity, equity and inclusion of all without regard to race, color, sexual. 00 Copper Roof Birdhouse 28x10-Patina $295. Bluebirds ’ requirements for nesting admit : Reading: Bluebirds FAQs: How to Host Nesting Bluebirds in Your Backyard. While a round entrance hole is the most. (2013), nest-box. And don’t worry, according to Sialis. 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. . When bird enters nestbox it trips arm, releasing the band which closes over the entry hole. I bought the recommended conduit and voila—the house was up and standing. High quality and USA made, find durable cedar, recycled plastic (or poly-lumber) and stunning vinyl bluebird houses with copper roofs. Eastern, Western & Mountain Bluebirds. Make the hole large enough for a double-headed nail to slip in and out easily. Gilbertson PVC Nest Box with Conduit/Rebar Mounting System 1/2" l. Drill a hole on the hinged side 2 inches up from the bottom and 1/2 inch in from the side. Look at their little pin feathers popping out! And already they are showing their true blue colors, with a bit of (dinosaur) green. They may be moderately effective against squirrels. . He already knew he wanted to attend the Tippie College. 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. Boxes placed in or around residential areas are likely to be claimed by House Sparrows. 8. Use Sparrow-resistant boxes. 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. Share. 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. Subtotal: $0. Select a durable, waterproof nest box. and cats from reaching the resident birds. 3cm) Loading. Enhanced Gilbertson Style Eastern Bluebird Nest Box. A House Wren constructs a nest in a Gilbertson-style nest box in my backyard. Squeeze box to match up the pins in the holes to reattach to roof. Designed by Steeve Gilbertson of Aitkin MN, the Gilwood has since established even as a favorite with both Bluebirders both the Bird themselves. 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. Share with:Tree Swallow nestlings must be able to fly well from the moment they leave the nest in order to fledge successfully. For more information on this bird house please see Amazon link below: PVC Bluebird Nest Box PDF (Nestboxbuilder. Install bracket at bottom. Gilbertson PVC bluebird nesting box The nest box is attached to a length of metal conduit, which is then slid over a piece of concrete rebar stake driven into the ground. Sit Back and Enjoy Bird Watching From the Comfort of Your Own Backyard ; Nest View: Remove the Base to View into the Nesting Box. com)Best Nest Box: My all-time favorite nest box for bluebirds is the Nature’s Way model CWH4. Aug 1, 2016 - Discover (and save!) your own Pins on Pinterest. Right Bird, Right House Interactive;. Each of these nest box styles work well for Eastern Bluebirds and they have proven successful at attracting bluebirds in Maine. Use universal trap. The Bluebird Recovery Program of Minnesota (BBRP), recommended boxes include the Gilbertson PVC, Gilwood, and the Peterson. Take a peek at eggs or. Nest boxes help maintain bluebird populations that have declined by as much as 90%. The Gilwood andNesting Box Selection Both box types were selected equally (Table 1). Made in. But what still needs to be tested is if the Eastern Bluebirds will decide to nest inside the Gilbertson box. Cut the top piece of the nest box, 11 1/4" x 11". joevic350. Red squirrels can enlarge the hole of the bluebird house and even take up residence if able to get inside. Try boxes with larger floor size, as House Wrens may prefer smaller floors. 5″ (1. Building bluebird nest boxes is a great way to help conserve birds at the local level. 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. 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. 00: Decorative, rooftop-style nest box for chickadees and wrens, made of recycled milk. Macrame Jewelry. If PVC boxes are paired with a wooden box, sparrows tend to choose the wooden box. Where. It is usually made of wood but can be made of plastic or even from cardboard. The shape is definitely similar, although the birch appearance is much more aesthetic. These boxes typically have two nests per year, but can have up to 3. Find a NABS Approved bluebird house or PVC and copper bluebird house, cool bluebird homes in wood too. Download plan: 170kb. 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. Bird House Feeder. The plastic pipe material and the shallow depth from the entrance hole to the nest box floor. This simple DIY birdhouse (nest box) can be made from a single board and requires only a few tools to assemble. When painting boxes use light-colored paint. Shop The Birdhouse Chick today!In my experience, if given a choice, BCCHs seem to prefer to nest in small NABS style boxes, or Gilbertson PVC boxes (vs. Bluebird houses that cost around $24 are basic, wooden nest boxes without too many extra [email protected]. 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. Photo Credit: Julie Perreau Research groups members in the Chugach Mountains. g. Make use of the employees’ contact info like phone number, email address and LinkedIn profile to contact key decision makers. Loading. PVC-style bluebird houses, like the “Gilbertson” nest box, have been shown to be very effective at deterring house sparrows. The idea is to place the pins or. Raccoons present a danger to cavity nesting birds. 0, Sept 8, 2011Page 1 of 1 1/2" EMT Coupling Longer screw at bottom 1/2" EMT Conduit 5 ft. com Find more info on AllPeople about Steve Gilbertson and Electramatic, as well as people who work for similar businesses nearby, colleagues for other branches, and more people. S&S Controller Repeating Nest Box Trap. Gilbertson nest box with Vern's Clydesdale mare, Doll. out-buildings, etc. 269. The Gilwood represented one of the most radical changes in bluebird nestbox design since manmade nesting structures were first erected for Eastern Bluebirds int the 1930s. Bracelet Crafts. A Well-placed. by Fred Stille and Steve Gilbertson. 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. " I currently have two bluebird boxes that are being claimed by one house sparrow pair. Another pioneer in bluebird trails is Steve Gilbertson of Aitkin MN who developed the Gilwood wood nest box and the Gilbertson PVC nest box. 478. This box has a shallow 4 1/2 inch drop from the bottom of the entrance hole to. Box is set up in yard relatively close to the house. The best dimensions for bluebird houses are: Entrance hole: 1. 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. A rough interior aids the birds in exiting the nest, and all houses should. NABS Fact Sheets & Plans. 3. Avoid gourds hung on trees: House Wrens seem to be. This Gilbertson Bluebird house is the most sparrow-resistant nesting. This is how to do a nest check on the Gilbertson Bluebird house. . Wood Birdhouses. Open top and Gilbertson nest boxes (see above) work rather well to discourage house sparrows from nesting in them. Red squirrels can enlarge the hole of the bluebird house and even take up residence if able to get inside. You may know the name for his famous nest boxes, but The Gilbertson bluebird feeder has actually been around for years. : "Blue bird house - Just put the houses up and waiting for the blue birds to begin building their nest. Sit Back and Enjoy Bird Watching From the Comfort of Your Own. Raccoons and Red Squirrels. Interior floor space: 5 inches by 5 inches to accommodate broods of five to eight chicks. The interiors of light-colored boxes stay cooler than dark-colored boxes. NABS Fact Sheets & Plans. , a 2-4 ft. Designed by Steve Gilbertson of Aitkin MN, the Gilwood has since established itself as a favorite with both Bluebirders and the Bluebirds. Simple to monitor, just squeeze the top of house with both hands to elongate and release the birdhouse part. Recently manufactured and updated, it's constructed of poly-lumber (or recycled plastic) to last a lifetime. Your email address will not be published. Gilbertson Bluebird Nest Box in PVC-NABS Approved. Either a Stovepipe (Kingston) or PVC wobbling baffle will guard your nestbox against climbing predators like raccoons and cats. Discouraging predators and other nest box invaders. Have also used NABS style boxes, wren house. $7. Yes, yes! The very best quality and the best price are here, promise!. Sep 25, 2016 - Free nest box plans for Bluebirds and other small cavity-nesters. Get Current Price. Photo by stevesunusual is licensed under CC BY-NC-ND 2. Visit. Slightly squeeze it again and it snaps back to the 100% 7/8 inch cedar roof. 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. 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. 5-2" wide x 6" long plastic screen (gutter guard) stapled tightly inside below the entrance hole to enable fledglings to exit. Bluebirds normally have 2-3 broods each season. . When painting boxes use light-colored paint. Gilbertson style PVC. Loading. This system can be easily used on any of the three nest boxes BAN distributes – the Gilbertson PVC, the Troyer, and the Gilwood. : "Gilbertson Nest Box - Already have these type of boxes and expanding territory so these are a welcome addition!! Gilbertson Nests have worked well on reducing the. Watch ( and listen) for Male Bluebirds, alone on a high branch singing to attract a mate. I monitor blue bird. Bluebirds prefer large expanses of short grass with a clear flight path, ideally facing a field. There are 70+ professionals named "Steven Gilbertson", who use LinkedIn to exchange information, ideas, and opportunities. They are intelligent and are good climbers; they can reach into a nest box hole and remove its contents. The selected our Gilbertson Nest Box and laid 5 eggs starting on April 2. Consider using a PVC-style bluebird house, like the “Gilbertson” nest box. These are inverted roof designs in positions of natural assembly. Homemade Bird Feeders. 4. At the time of organizing back in the 1970s, BBRP was the first state bluebird organization in the nation. Gilbertson. 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. PVC is weather resistant, so the boxes will last a long time with minimal maintenance. : "Fast delivery, easy setup, birds nesting already - Trying to deter house sparrows, wanting bluebirds. Boxes placed in or around residential areas are likely to be claimed by House Sparrows. Material needed: 1/2″ interior diameter steel pipe cut to 8-1/2′ lengths. Bestseller. Certainly many thousands of birds have. Those were among conclusions resulting from a research project conducted by the University of Florida Department of Wildlife Ecology and Conservation which compared Peterson and Gilbertson bluebird nest boxes. He had made it to the top . Cut the two side pieces. It needs to face the right way. thinwall auto paste improve ach fo pins Gilbertson Bluebird Nest Box Drawing by Oon Bragg is not Note that the Gilbertson box with the round entrance has a different roof design than the Gilbertson box with the slot entrance. 3. Narrow (3. ) HORIZONTAL SLOT 1 1/2" x 1" slot. WITH VIEW & CLEAN DOOR - Opening side doors engraved with "clean" and "view". Wednesday, November 15, 2023. Steve Gilbertson no longer manufactures bluebird products, but you can get this style trap from the Purple Martin Conservation Association for $13. In particular, the PVC Gilbertson nest box, Troyer nest box, and Gilwood designs have gotten encouraging results. WITH VIEW & CLEAN DOOR - Opening side doors engraved with "clean" and "view". It was called the Gilwood box. 9. 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. 00. Thank you David. A Gilbertson nestbox is made out of a PVC tube. The PVC nest box is nothing new for Bluebirders. Woodlink NABB Audubon Bluebird Houses. The bluebirds settled down and started going in and out of the. One style of bluebird box that has proven to be very successful in mid-Missouri is the Gilwood nest box (Figure 4). It will also deter squirrels, chipmunks, mice, and rats as long as they cannot otherwise jump to the box. 99: PVC pipe, sparrow-resistant, top-opening, small: Amazon: Average Price $32. With only 1. 1 percent of artists who applied for a Scholastic Art Award and they flew him to New York City to attend the award ceremony. Category. But until now, it wasn’t clear how well these nest guards worked, said Bailey. 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. Modified Gilbertson PVC. And they are not at all effective against snakes, chipmunks or competing. 3) Mark’s Bird House With Hole Guard. That Gilwood represented one of the most radical changes in bluebird nestbox design whereas manmade nesting structures what first-time erected for Eastern Bluebirds in the 1930s. 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. Sand all edges prior to assembly. 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. Eastern Bluebirds begin defining and defending their nesting territories earlier than other species — generally, starting the end of February, early March. 3. 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. Out of the 37 box-pairs, bluebirds occupied both box types in 15 box-pairs. A 1. Today. These Audubon bluebird birdhouses are simple, well-built, and untreated. English Sparrows can fit through entrance holes as small as 1 1/4”, therefore most cavity-nesting songbirds using nest boxes are vulnerable to English Sparrow competition. Bluebird Houses. 75, 5, 5. It will also deter squirrels, chipmunks, mice, and rats as long as they cannot otherwise jump to the box. 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. Why would bluebirds build a nest. Got wrens so far, within days! At least not HOSPs!!". Consider using a PVC-style bluebird house, like the “Gilbertson” nest box. Bluebird Nestbox Version 1. Ultimately, when choosing a bluebird nest box, ther. This nest had moss and leaves and bark strips that I do not usually see with house wrens. 1. 4 x 13 inches. The bluebird parents take turns bringing bugs to the nestlings all day long. The wooden fence post does not exclude predators. A GILWOOD BLUEBIRD NEST BOX Assemble the box using wood screws and glue. Pay in 4 interest-free installments of $18. 56-inch entrance hole that is just right for small birds to get in and too small for unwanted birds. This model includes a stay-clear, crack-resistant viewing window to allow for nest viewing. Fill out the requested information. The next step to build a bluebird house is to cut part D from a 1×4 so the end is 45 degrees, and then reset your saw to cut the piece to final length. Recently manufactured and updated, it's constructed of poly-lumber (or recycled plastic) to last a lifetime. $36. There are 2 nest boxes wherein the vent holes are drilled, cutting the PVC pipe, thus producing these nest. Check out our gilbertson nest box selection for the very best in unique or custom, handmade pieces from our feeders & birdhouses shops. Since this article is finally being published (in September)- The Henderson's did see swallow babies fledge from the Gilbertson. Just a warning that the Peterson nest box can be tricky to build. See Comparing Pros and Cons of Various Predator Guard Styles. Apr 26, 2018 - Below are simple, free bird box (birdhouse, nest box) plans that can be used to attract bluebirds, swallows, chickadees, nuthatches, warblers, woodpeckers, wrens, and other birds to your backyard or garden. 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. There are 31 other people named Steve Gilbertson on AllPeople. Jun 25, 2016 - The best bluebird house around. 15. Most building supply or hardware stores will cut pipe to size if bought there. High quality and USA made, find durable cedar, recycled plastic (or poly-lumber) and stunning vinyl bluebird houses with copper roofs. IMPROVED Troyer-Haskell Troyer Tunnel Trap. Avoid gourds hung on trees: House Wrens seem to be. Easy to build. Leaf. Gilbertson PVC Nest Box. The data came from NestWatch, a citizen science. Hanging Box: if you have a spare, replace the dirty box with a clean one. Metal globe hanger with glass dish feeder allow for a variety of treats; fruit, jelly, meal worms, peanuts, suet, or seed. Sometimes these birds opt for man-made nest sites and adopt nest boxes. 5" diameter entrance hole is needed, while the Western and Mountain bluebirds prefer a slightly larger 1. Bluebird Houses with side door or Gilbertson Nest Box are best. Additional information is available at or by contacting Steven Gilbertson at (218) 927-1953. Find helpful customer reviews and review ratings for 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. Feb 6, 2018 - 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. Species. in; drop: variable from 5" to 8 1/2". House Wren; Tags. Another great option is vinyl because it's mold and bacteria resistant, and unlike wood, PVC/Vinyl material lasts a lifetime. Take the dirty one home, dump the contents, hose it down, scrub and rinse. Forty-two nest boxes were placed in late Mayon random fence posts and trees with little consideration of habitat needs. Gnome House. Three weeks after putting up the Gilbertson nest. Drill at a slight downward angle, going through the front of the house and into the side. Easy to build. Premium bluebird houses in the $35-$40 range are usually easier to open, easier to clean, and may have features. . in. Actually, there’s a lot more to these bluebird houses than meets the eye! Bolt and Bracket. The bluebird parents take turns bringing bugs to the nestlings all day long. For hole boxes, temperature and feeding rate affected fledging success. Drill a 5/16" hole through nestbox back and pole. Sep 25, 2016 - Free nest box plans for Bluebirds and other small cavity-nesters. Gilbertson Nest Box - NABS Approved. 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 PVC (Gilbertson) nestbox is a unique design. Nesting bluebirds. org… MYTH: If you open the bluebird box, or touch the nest or babies, the parents will abandon the nest. Note: Bluebirds become quite territorial during nesting season. Fitting. Gilbertson Nest Box - NABS Approved from $36. Shop The Birdhouse Chick today!Discover (and save!) your own Pins on Pinterest. The front of the box should not be attached with glue or nails; it is held in place by the. Wooden, angled-top nest box for wrens or chickadees: Amazon: Welliver Outdoors Cedar Chickadee House: $39. : "Gilbertson bluebird house - I haven't got to use it as my blues are gone for the season but it arrived in super time and in excellent condition. Here is the Solution4Patio Description:.