In large bowl, combine three envelopes (1/4 oz. each) of gelatin with 6 T. of cold water. Let stand for one minute. Add 1 cup of boiling water and stir until gelatin is completely dissolved. Gradually add 6 cups of birdseed to the mixture, stirring to combine. Spray inside of Bundt pan with nonstick cooking spray. Pour the birdseed mixture into the Bundt pan, and press it down firmly. Place it in the refrigerator for several hours. or until it is completely set. Remove the wreath from the Bundt pan. Tie several lengths of twine or raffia around it and suspend it from a tree branch that you can see from inside your home.