Nice song :D. It feels very calm. The drums are soft and almost low-pass-filtered, which brings them nicely to the background. The sine-waves (which I assume is the 'Basic Synth Flute') also fit well with a peaceful bird vibe. The delays (repeats) on the notes give this a nice fading and calm feeling. The song feels full and has enough variation to never bore - I could listen this on repeat for a while. I really like it :)