Instead of bluebirds, we do have a mating pair of Tree Swallows in the boxes left of the 5th hole.
Tree swallows, like bluebirds, are secondary cavity nesters, who rely on holes in older trees to build their nests. Golf course workers always enjoy the presence of tree swallows as they sometimes provide company with us as we mow turfgrass. The tree swallows artistically fly and swoop in circles around us, hoping to catch insects that we disturb during mowing activities.
We will nurture fledglings of swallows in a few weeks. and hope to lure bluebirds later in the season to Potowomut. Here is a pictures of a tree swallows on the 5th hole.