First visitors to this new house design. Most visits are to the tubes. Only a view to the wood block. At first, these visits seemed like scouting because the time duration in the hole was short. After a few days, the stay was 3-4 min inside the holes. Bee always backs out to leave. I often do photo stacking of bee flights with honey hives. Honey bees tend to approach with a tobacco pipe shape. They swoop down, then up. These bees so far seem to have a "s" with a pan across. Maybe this is a scan of the vertical terrain?