Hironbec Pendulum anti HOSP device for bird nest boxes First Look

First video on this invention. As season progresses I will be doing updates on the effectiveness of this device.
Followup video with chickadees:
• Hironbec Pendulum prot...

[@dianecrumbley90]

Thanks. I hope this works for you and your chickadees. 🐣

[@agile1111]

Thanks, should be interesting to see how the birds respond to this safeguard.

[@agile1111]

Chickadees used the front yard box with this installed and it worked perfectly. Six chickadees fledged successfully. I hope to have some videos made of them in the future.

[@noahway13]

Rube Goldberg would be proud

[@yansfor5306]

How has this worked for you? I have been planning on putting some nest boxes, but I'm planning on buying a trap to catch house sparrows and I want to buy this if it helps.

[@vadims8742]

Does it work? It's too complicated device for a nest box. Just make less-diameter hole.

[@agile1111]

Chickadees in my area will not build a nest in a box with a smaller hole to start. You can do a 1.5 inch hole to start and after they lay 1 egg THEN put on a size reducer and they will accept this since they are now committed. So the advantage of the Hironbec is you give them a 1.5 inch hole and then leave it. They get and keep their preferred hole size for the duration of the nesting cycle.