This queen buff-tailed bumblebee (Bombus terrestris, also known as the large earth bumblebee, just has the most awesome fur coat. So dense!
The really pretty flower that is enticing here is an eastern purple coneflower (Echinacea purpurea) which really is a bumblebee (and also butterfly!) magnet.
If you look a little closer on the bumblebee, you can see that it has a couple of stowaways in the form of phoretic mites. These don't hurt the bumblebee but just use it to taxi between places.
Part 1 (closer) here: www.flickr.com/photos/tinyturtle/51546596003/
Part 2 (from the front) here: www.flickr.com/photos/tinyturtle/52719268452/
Part 3 here: www.flickr.com/photos/tinyturtle/52809691530/
Part 4 here: www.flickr.com/photos/tinyturtle/52911928384/