I like it! Please bear in mind I'm a complete noob here, so anything I say can easily be ignored, and I'm coming at it from a perspective of "this worked for me", rather than "this is what I think should be technically different".
I like background blur, I really do, but it's a wee bit too blurred for me on this one. On the bright side, it
really makes the bird pop. On the downside, it looks kind of abstract. Not that that's necessarily a bad look, but there's just something that seems off about it, at least to me, personally. The contrast with the white railing seems off because of it too - having said that, mind, black bird on white railing contrast = awesome, I do like that.
I really love how sharp the bird himself is, though. You can either talk to birds or got really lucky with his expression - or sheer talent to grab the shot right at that moment - because the look on his little avian face is fantastic. I like the play of light on his feathers, too. It looks almost like you could reach out and touch him, or rather, if you tried, he'd give you the evils and fly away!
Overall, I think it's a great image, I'm just not personally convinced on how blurred the background is, but I realise that's a very personal-choice, your-mileage-may-vary thing. And again, total noob, so going on aesthetic instinct rather than technical knowledge. It's far better than I could have done except by a very lucky accident! Nice work.
