I must say I really dislike the faux graffiti splodge styled background - I think you could get some really interesting shapes and forms into it if you went further with the detail. I'm imagining a larger array of smaller bubbles, more curves... hmm hard to explain. Not keen on the large cirlces and straight drips. Love the bird.
It isn't exactly hard to imagine there's a more suitable background for it, perhaps the 'splodge spray' is not the "one". Guess if there should be a background at all is should be somewhat in style with the bird, I'm thinking colours.
Here's my inspiration source
http://mattsewell.co.uk/?p=744And:
Forest background? Clouds? The bird in a tree?
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Edited some more again. Played around with colors, mabye the backgrounds are to noisy and draws too much attention away from the bird.
Here they are anyways: