Nesting shelf for birds

[ZandraJoi]

https://www.birdsandblooms.com/backyard-projects/diy-birdhouse/nesting-shelf-diy-birdhouse/

We've made wooden ones but this uses items you may have already around the house or can easily find to repurpose.
Have any of you made one? What materials did you like to use? What kinds of birds used it?

 

[Shortie]

Wooden ones I would imagine would be sturdy for a while but would eventually have issues. I wonder if using something similar that is mentioned in the link would allow it to be more sturdy or would also result in it having issues.

I love how you can use resources that you would find around the home though as that is always ideal and prevents needing to spend money to make it as well.