The Druid Hills Tour of Homes & Gardens featured a home with a huge number of pollinators visiting a hawthorn tree in bloom. Most of the pollinators are not the familiar apis mellifera. I'm not completely sure, but these pollinators appear to be Small Carpenter Bees. I used two resources, the XERCES guide -Attracting Native Pollinators and Bees of Georgia website by Mark Schlueter. Notice the pollen baskets. These natives are similar in size to apis mellifera, not shown.