Another from the recent trip to Costa Rica. Reviewing the images of these guys I find that these guys are exceedingly difficult to capture well and that the light needs to fall on them in just the right way to bring out the colors. I hope I succeeded here.
Christoph, I agree with Juan Carlos that the bird looks to have been slightly off-plane here. I thought you had one or two with a better profile, in which case I think the lighting would better show off the bird's plumage.
I like the composition a lot, the color are also nice except the bird, in my monitor it looks underexposed (I don't know the bird), I also think that the head angle its not the best. But its a great shot and not easy do do...