Bird Nesting Alpaca Fiber
Alpaca fiber is simply the warmest all-weather friendly fiber. It contains microscopic air pockets that provide great insulation and keep birds warm. The fibers are fine, lightweight and silky, yet this luxury fiber has great strength and durability. Chickadees, titmouse and other songbirds love and use it.
Find a cage-like container or something with holes in it so birds can pull the fiber through. Stuff the container with the alpaca fiber or make a ball and tie off with twine, then hang it outside.