Most sparrow resistant design available.
Gilbertson pvc box.
By backyard bird lover.
Pvc will not rot split or crack nest box will host many successful broods with its great features.
Removable body allows monitoring and maintenance.
They have exceeded our every expectation and in the 8 boxes we have set up this year every one hosted at least one family of either tree swallows.
Now with optional poly lumber matching roof.
Preferred by blues over the years cool birdhouse mounts quickly and easily on 1 2 inch conduit.
The gilbertson pvc nest box was recommended to us by a local bird enthusiast who had heard that house sparrows did not seem to like or nest in these very well constructed and attractive round boxes.
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.
Light weight and durable the gilbertson pvc bluebird box is designed to fit any 1 2 inch pole.
To open the box the monitor squeezes the box at its top until it comes free from the pins.
Steve gilbertson uses the thinner walled pvc because it is more flexible and flexibility is what makes his unique box opening method work.
Just slightly squeeze the pvc tube in the front and back at the same time and it releases.
Just squeeze the top opposite pins.
The gilbertson nest box is approved by the north american bluebird society.
Slightly squeeze it again and it snaps back to the 100 7 8 inch cedar roof.