Predator protection for nesting boxes

prusaprinters

<p>This tube is intended to be boltet down in front of a nesting boxes entrance hole.&nbsp;</p><p>It prevents predators, like feral cats or raccoons, from just reaching into the box to feast on the birds. This is especially importand at low hanging boxes, boxes and houses on poles or if there are any branches near the box<br><br>The protector has slots on its circumference to make it appealing for birds to go trough.&nbsp;</p><p>Note: the slots are wedge shaped in order to pinch a predators arm if it just trys to reach in from the side. By this no harm is done but a leasson learned to better not try again. The radii on the bottom and top end of the slots PREVENT the birds feet from getting cought in a similar way.<br><br><strong>CHANGE LOG 01.10.2022:</strong><br>The inner diameter is changed from 45mm to 44mm in order to make the walls slightly stronger.&nbsp;</p><p>&nbsp;</p><p><br>credit where credit is due:<br>I got inspired by a similar tube <a href="https://www.printables.com/de/model/140027-predator-protection">https://www.printables.com/de/model/140027-predator-protection</a> but had some problems printing it at verry high speeds due to the circular shaped holes. So i came up with my design</p>