As the snow begins to melt, we are turning our minds to pulling down the bird feeders and planting seeds.  However, there is no need to turn our minds completely from our feathered friends.  Soon they will be making their nests and you can assist them by hanging roving-filled nesting balls from the trees in your backyard.  Nesting balls should be filled with natural fibers:  roving, 3” pieces of natural woven fibers, feathers, fur, and straw all make good stuffing for the nesting balls. You don’t want synthetic material, nylon, long pieces of yarn or string, dyed materials, or dryer lint.  Love.Yarn.Shop. has nesting balls filled with wool roving for sale for $8, and assuming the birds don’t take the ball itself, they are refillable.