Add ¼ cup boiling water to the gelatin mixture and stir until the gelatin is dissolved.
Add the corn syrup and stir until dissolved.
Add the birdseed and combine.
Refrigerate the birdseed mixture for 15 minutes.
Place cookie cutters onto a lined baking sheet and use the back of a spoon to press birdseed firmly into the cookie cutters until filled all the way to the top.
Place the pieces of drinking straw through the tops of each of the shapes leaving ample space between the hole and the edge of the shape.
Refrigerate the ornaments overnight.
Pull the pieces of straw out.
Gently pull the sides of the cookie cutters away from the ornaments and push the ornaments out of the cutters.
Cut off a piece of twine, loop it through the hole in the ornament and then tie the two ends together to create a "hanger."
Hang the ornaments from tree branches in your yard.
Notes
The larger the cookie cutter, the closer the hanging hole should be to the center of the cookie cutter. Depending on how large of cookie cutters you use, the recipe should make 3-4 ornaments.