Hello Rene,

I finally found an application, Handbrake, to condense videos.

The swallows are well established, and I am quite sure we will have a new family very soon.

Your pendulum certainly helped to keep a few sparrows from taking over the box.

There were a few fights between the swallows and sparrows, but the swallows prevailed.

All seems quite calm now, and a level of acceptance seems to taken over the local sparrow population. It's very interesting. I hope it continues.

Thank you for your continued support Rene. It is appreciated.

Best regards,

Rob Clarke, Illinois


I wanted to let you know how much we absolutely love your new hironbec pendulum. We have a lot of quite aggressive house sparrows in the area. I've tried deterents, different nest box designs, slingshots and trapping both in box and repeating sparrow traps. Despite all that, in the past four years we have lost all but one nesting pair of swallows that attempted to claim our nest box. Early this spring, despite my attempts to deter the house sparrows, I was ready to take our nest box down and give up as the sparrows had already attacked a new pair of interested swallows. Then I found your website and ordered your pendulum.

It is excellently designed. Sturdy, simple and performs perfectly. The instructions sent with it were perfect. We followed them and in no time our swallows had figured out how to use it beautifully and the sparrows were stumped.

Thanks entirely to your pendulum, we were able to spend our early summer watching our swallows build their nest, brood and raise their chicks all without any harassment from the sparrows, for the first time in four years!!! Thank you so much!

Our nest box with it's pendulum is safely stowed for the season, and we are so happy knowing that swallows have a safe home to return to next spring. We recommend your pendulum to everyone who stops by our yard.


Shelly Campbell


Iíve just installed the 5 Nest Pendulums that I ordered before on some of my nest boxes in South eastern Idaho. The Swallows are just arriving at our location and the nest boxes look like beehives from all of the activity from the swallows.

They appear to be adapting to the pendulum. The first day or so, they would just hang on the hole, but yesterday they started venturing into the next boxes. Iíve got them adjusted where the sparrows land and the pendulum does not let them in.

Thanks for coming up with this device. Since we live in Utah and only visit the nest site on a monthly bases, this will let me know that the sparrows have not trapped and killed swallows on the nest.

It appears to work great, so Iím in the process of ordering 5 more pendulums for the rest of my nest boxes. Iíll be sending the order in today.

Thank You Greg J. Cover


I just wanted to say thank you! I installed the pendulum the moment it arrived as our nesting tree swallows were trying again.

About 2 weeks ago we witnessed our swallows (3 babies) get attacked almost to death by a male sparrow before I was able to rescue them. I brough t them to our local song bird rescue center and they are doing well!

It was then I decided to try many different size holes and shapes to no avail. Nothing worked.
Then I found Hironbec! You shipped them so fast we received them in 3 days in Washington state, USA. I followed the instructions and our swallows took right to it! They thank you too.

Please watch our video

Jeff and Dawn Bauer, Washington