cast iron bird house

I guess it's the time of the year to put out the bird houses.
I like to hang the ceramic and red ware bird houses in our yard. The wooden ones don't weather very well, and they soon rot out.
I found this one at a yard sale. It's made of cast iron, so, it should weather well. The hole is a little large, but, it has great drainage holes in the bottom so the babies can stay dry.