Such an intriguing pic, I thinking it's sunning. I am always happy to see birds do their own things. two days ago, I found a blue jay sitting on edge of the bird bath/ drinking bowl and all puffed up in a quite similar pose to the hummer girl. late afternoon sun, all I saw at first was a 'big' white bird. It took me a while to realise what it was, and even more time to get my camera (limping still), so you will just have to use your imgaination this time.