Alternative cuckoo's nest cover

I have been working on some other possible resolutions for the Cuckoo's nest cover. I am really not satisfied with the one that I have already created. I tried another design that I had come up with, but I'm not sure I like that either. I like the concept of syringes, but I don't think that they work when they are enlarged this much.

I also tried some birds under the idea of 'cuckoo's'. I think this works okay, but I feel that the concept is too straight forward and obvious.