The Birch Fence is a fence you can build (the Hearth kit).
In-game description
Birch withies woven between white stakes, the tundra way. Pens animals in; a jump clears it.SHOWN IN THE BUILD RING
Building it
It costs 1 
Wood, 1 
Cotton Grass, 1 Water spirit. Take it down with DISMANTLE to get its cost back (see Building).
