A Bird's Nest is an item obtained from either cutting down logs, or killing the Giant Mole .
Obtained from WoodcuttingEdit
Bird's Nest are an uncommon drop from any experience giving tree, including Ivy.
When you obtain a Bird's Nest, you will get a message in your gamechat that says-
"A bird's nest fell out of the tree!"
You will then have it automatically in your inventory.
Obtained from Giant MoleEdit
The Giant Mole , which can be found under Falador Park, always drops Mole Skins, and a Mole Claw. These can be traded in at Falador Park by talking to the Gardener, who will give you a Nest with each.
There are a long list of rewards you can get from a Bird's Nest, and they all depend on what the item within the birds nest its.
There are multiple different Rings you can get.
As of yet, Raven and God's Eggs serve no purpose. However, in the future they may be used to create Pet Birds.
The rings can be enchanted, thus giving them effects depending upon the gem in the ring, or they can be sold, either in the Grand Exchange, to other players, or in the general store.
Seeds can be used with the Farming skill to create various trees, such as cuttable trees, or fruit trees.
Lastly, the Nest's themselves can be grinded up, then used to create a Saradomin Brew through Herblore.