An interesting loop! You're processing of the bird calls is really cool, sounding natural and electronic at the same time. I think that changing that midi-esque piano sound, to a higher quality piano would improve the overall feel drastically.
It also feels overly compressed. The sub is drowning out the other parts, and the drums lack punch because of the over-compression.
The over-compression also means that listening to this for long periods of time would be very fatiguing, which is not a good thing for a loop.
Still, I can imagine an interesting, artsy, colourful flash game suiting this rather well, nice work.