Ruby-throated Hummingbird

I have been experimenting with hummingbirds. In this case I set up a blueish background behind and a little to the right of the feeder and light it with a Nikon SB800. The Nikon D3 had a SB900 with a Better Beemer on board. I think the result was fairly good. I hope to get as many opinions as possible. Thanks in advance. Shooting data below:
850mm
850mm (in 35mm film)
Subject dist: 5.62m
1/3200 sec, f/5.6
Mode: Tv
Metering: Multi-segment
Exp comp: +1
ISO: 1600
White balance: Auto
Flash: On
File size: 64.1MB
Image size: 1854 x 1348
Color space: sRGB
Saturation: Normal
Sharpness: Normal
Contrast: Normal
Color profile: sRGB

I'm always impressed with hummingbird shots that come out sharp and clear, so I am impressed with this one. I like your choice of bg for this bird. I wish for two things though, some separation between the wing and beak/head, and a different crop to give more room on the left.

Fantastic shot! Color and details are spot on! Would have liked to see the whole beak.

Lovely detail and like you say, fairly good. Not sure about the shade of blue, but it seems to work. Would have been nice to see beak as others have mentioned. Seems to be a bit of noise in the wings. A couple of spots just above your name. A touch more room at the tail.