The June 3rd show featured a conversation with hummingbird bander Fred Bassett. The conversation was originally recorded in 2013 when Fred was travelling through Alaska banding Rufous Hummingbirds. You can read about his trip in a brief report he published (pdf) on his website, hummingbirdreaserch.net.
The PBS video he mentioned during the show with the hummingbird interacting with a bumblebee can be seen on youtube here.
If you have questions or observations you want to share, please feel free to leave a comment here or on the page I’ve set up for that purpose.