I just filmed this video of a nesting site of solitary ground bees. They are really fun to watch as they reinforce thier holes and forage. This nesting site is at least five years old and holds several hundred individuals.
Sorry the quality is not better.
http://youtube.com/watch?v=lDmEoXF1yYU
Sorry the quality is not better.
http://youtube.com/watch?v=lDmEoXF1yYU