This is incredible! And so colourful!
I'm working on a nursery right now and I think something like this would be soo cool in it. I'm sure it takes a lot of practice to get that good though >.>. What kind of paper do you use?
I have one more question. Around the border of each piece it looks like you've used a shade darker colour of paper underneath to give it more dimension, but in the close up it actually looks like you may have just gone around the edge with marker for that effect. Which is correct?
The paper I used came from a Joanns cardstock stack, I actually decided to make a parrot because it was a rainbow stack and didnt really have any neutrals! Also to add depth and interest i did go around most of the layers with a marker of a slightly differing hue I think it adds a little more contrast that way
Like I said, this was actually my first papercut so I would definatly encourage you to give it a try, its a lot of fun and sort of like drawing with paper! I could also post some progress pictures for you if you think they'd be helpful.