Rhynchokinesis

I was going back through old images and I had taken a very large number of hummingbird images on May 22nd.  Since that's a hot time for photography, I'd just done a superficial cull at the time.  Going back through them, I found this one.  I've seen Hummingbirds with their beaks open and with just the end opened, but this is the first time I've seen with the proximal end of the beak open and the distal end closed (you have to view the large image to see it well).  Given the images around it, this was probably part of a threat display to another hummingbird.

7DII, Sigma 150-600 C @ 600mm, f/9, 1/200, iso 640, aperture priority, pattern metering, -1/3 EV.  Processed in LR5 & CS6.  Cropped to 10.8 MP before resizing.  Taken at 7:51 AM on May 22nd, 2016.

Comments and criticisms are always appreciated.

Thanks,