If your primary aim is to observe the squirrels that come to your yard to feed, make sure the feeder is located in an area that will be visible to you.
Try attaching corn cobs to a bungee cord which is then hung from a tree limb or platform. Squirrels will perform acrobatics in an effort to feed on the corn, which is entertaining to watch.
If the squirrels knock the corn to the ground, it largely defeats the purpose of employing a hanging feeder which is designed to make the squirrels “work” for the food.
Back= 10 x 5 inches Base = 12 x 5 inches Sides = 5 x 5 inches (2 pieces) Lid = 5 1/2 x 5 inches
The two side pieces need a 1/4" deep saw kerf made about 3/16" from front edge. This will allow the plexiglass front cover slide up and down. One of your side pieces needs a hole drilled thru at the saw kerf, so that it is just large enough to allow the nail to be put in by hand. This will keep the plexiglass from being lifted up by the squirrels.
Make sure to use the screws that came with the hinge piece to ensure all the components fit together properly.
Squirrels eat a wide variety of nuts, seeds and plants. While peanuts and corn, due to their wide availability, have become popular choices in stocking squirrel feeders, they actually provide very little nutritional value to the squirrel. Hickory nuts, butternuts, walnuts, sunflower seeds and pumpkin seeds are all healthy substitutes that the squirrels will enjoy. [7] X Research source
Alternatively, you can make your own seed cake at home by purchasing the mix of seeds you want to feed the squirrels and mixing them together with lard or gelatin mix. When using lard, melt the lard in the microwave, which usually takes about 2 minutes and then stir in the birdseed. If you decide to use the gelatin, measure out an appropriate amount of water into a small saucepan and add the dry gelatin, heating the mixture on the stove for a few minutes until the water dissolves the gelatin. Then, take the mixture off of the heat and stir in the birdseed. Place your seed/lard/gelatin mixture into your desired mold, on top of parchment paper to avoid any seepage, and let it set in the refrigerator for a few hours.
If you purchased a hanging seed cake holder, you will want to look for a tree with a reasonably-sized, low-hanging limb that is perpendicular to the ground to which you can tie the seed cake holder. If you purchased a seed cake holder that fastens to a tree or post, place the holder roughly six feet off the ground and follow the fastening instructions on the label.
The food source you select often plays a role in deciding what sort of feeder you may want to build. Squirrels like to eat corn and will find a multitude of ways to get to it. Also, corn is cheap and readily available in most areas, making it an ideal source of food for a squirrel feeder. Native nuts are a good choice of food. Walnuts, acorns, pecans, or whatever nuts grow in your area are natural squirrel food. Of course, these must be raw and not salted or flavored. Sunflower seeds are also a good food for squirrels. Many people feed squirrels peanuts, but unless they are roasted to kill a toxic mold, squirrels can get sick from eating them. While squirrels will certainly take advantage of a readily available food source like peanuts, they are of limited nutritional value to squirrels. Squirrels also need a source of calcium to be healthy. Consider buying a special calcium mixture made for squirrels or provide occasional bones for your squirrels to gnaw.