Hoping to get some clarity on this specimen (3 photos attached, different perspectives may help). I was surprised to see a bumblebee where the back of the thorax was blackish or with very few yellow hairs (not something I've seen before). Using the Princeton guide (Williams et al, 2014), I'm guessing this is a male American Bumblebee (B. pensylvanicus) given that this species can include a mostly black face and rear thorax, mostly black side of thorax, a mostly yellow front of thorax and upper abdomen with a tiny bit of black towards the end of the abdomen and a very slight orangey tip to the abdomen.

Of course, outside expertise is greatly appreciated. Specimen was found nectaring at a New England Aster (Symphyotrichum novae-angliae) in an overgrown hedgerow at the edge of farmland, where farmland transitions into the forest and swamps of the Minesing wetland complex.