By the size of the bird house, It think it was meant for a wood duck family...It is quite low on a weeping willow tree at the Miller Island refuge area. We didn't see any wood ducks, however, being to late in the season and it not being very wet, I think we saw a number of ducks and geese and ran out of daylight before we had to get back over the pass. They were expecting quite a storm, however I'm not sure anything but the wind really materialized last night.