Although natural cavities can be provided by leaving standing dead trees, the easiest way to supply ample nesting cavities is to build and install songbird boxes.
Multiple days passed before I realized that the flit out of the corner of my eyes happened way too consistently to be my imagination, so I started paying closer attention.
For three days during my internship this summer, I had the opportunity to conduct bird point counts at Southern Wisconsin Bird Alliance's newly acquired property: Hillside Prairie Sanctuary.