Australian Owlet-nightjars are a relatively small and shy nocturnal bird, that mostly eats insects. They sleep in tree hollows by day, and also nest in tree hollows.
Here is a diagram with nest box key design features. Just note that this Owlet-nightjar nest box does not need the climbing groves added.
Here is a diagram with nest box key design features. Just note that this Owlet-nightjar nest box does not need the climbing groves added.
Here is some info on the different materials to use, or not to use when making your nest box.