Add birdseed and sunflower seeds to the large mixing bowl
Add in the peanut butter
Mix using the spatula until everything is incorporated
Line the cookie sheet in parchment paper and place your moulds on it
Scoop the birdseed mixture into all the moulds and pack it down
Use the popsicle stick to make a hole in each treat. Make sure not to make the hole too close to the edge as there needs to be enough material so it can support its own weight. If in doubt, just make the hole in the center.
Place the cookie sheet in the freezer for about 3 hours (or until frozen solid)
Remove from the freezer and add twine or ribbon to each one.
Place these wild bird treats outside once the temperature is consistently staying below freezing.
You could reduce the amount of bird seed by 1/2 cup and replace it with the same amount of cornmeal or dried fruit.