I've been making a few felt pods recently and thought one might translate well into a bird house. My only concern is that the squirrels will probably destroy a wool pod in a fraction of the time it took them to ruin the wooden bird house. I will have to find a squirrel-proof location for it.
I started with a tear-drop shaped resist and used 4 layers of merino for my first attempt. Unfortunately I made the hole too low and over stretched it while fulling the inside the pod. I think that pod will become a suspended bowl / pod.
For my second attempt I used strips of red muslin, green merino and grey gotland. This is what it looked like just after removing the resist and before a quick spin in the washing machine.
And after it came out of the machine. As before the grey gotland has consumed everything else, including the muslin:
I selected a spot on the side of the cabin that hopefully the squirrels won't be able to get to, here is the pod in situ:
I added some fluff groomed from my cat as extra encouragement for the birds to move in but only time will tell if my pod is up to avian standards....