It's always nice to see new builders on Flickr, and it's even nicer when they're posting MOCs as good as this one. Josephine Monterosso (jigsawjo) just showed up this month, but she's already posted probably 20 different builds ranging from mosaics to mecha. I'm only highlighting one of her builds in this post, but I highly recommend you go give her a follow and check out some more of her work!
This bird's nest must use just about every flexible brown part that's been produced - flex-tubes, bullwhips (thanks Indy Jones), and vines, as well as a few rigid parts. It has a very nice natural aesthetic and looks just like a real bird nest, complete with a couple of eggs that hopefully will soon reveal a couple of baby birds, mouths agape to receive a fresh worm or two from mama bird. While actual egg pieces technically exist (from the Angry Birds sets), I like the use of the light-blue minifig heads here, presumably as robin eggs.