Mating away. They make a nest each year in my vent for my half-bath. We never use the fan in there, so we let them use it. They tried the dryer vent, but hubby said "NO!" lol anyway they hatch 3 or 4 groups each summer. So precious! The babies get to where they poke their little heads out and then one day they FLY! I will try to get photos later when the first batch hatches out.

That is so cool...
My mom has a hanging basket that had a plant in it and she rehangs it every year the sparrows love to lay eggs in it.