Hi all, what type of material aterial do I use best for birdhouses that I will use outside? and also what birdhouse do you have and did birds indeed layed their eggs there?

Hi all, I am pretty new to 3d printing and already printed a lot. I now have an idea for our garden but need a bit of help. I want to print all different kinds of birdhouses where birds can actually brood their eggs. What kind of material do I use best and also can you show me your birdhouses?