First, it is important to realize that a yard or park must be providing suitable habitat for squirrels or they wouldn't be there. Desirable habitat includes food and water, nesting sites, large trees, protection and comfort. Also, fox squirrels are not native to Colorado therefore they lack any natural predators. Second, consider the existing situation, ask these questions and develop a response to each:
--Are the squirrels causing property damage, or is their presence simply unwanted?
--What behaviors can or can't be tolerated?
--What can be done differently to discourage them from coming around or doing damage?
--What are neighbors doing to attract or repel squirrels?
--Are you willing to invest time, money and be persistent in dealing with squirrel behaviors every year, or are you looking for a quick, permanent solution (if it exists)?
Changing the yard habitat to make it less desirable can reduce squirrel problems; for example, if a squirrel baffle is attached to each bird feeder in the yard, that will limit the squirrel's access to seed, and birds can be enjoyed while excluding squirrels. However, squirrels are ambidextrous, clever and persistent. Backyard bird watchers are constantly implementing new tactics and inventing "squirrel proof" bird feeders in an attempt to foil these clever rodents. Books and resources on this topic are readily available at local libraries, bird stores and online. Other solutions to keep squirrels at bay:
--Eliminate food sources;
--Trim tree branches ten feet away from fences or roof lines;
--Wrap tree trunks with metal flashing;
--Repair holes around home or sheds to prevent nesting;
--Apply hot pepper sauce to areas being chewed.
What about trapping and relocating squirrels? This is a solution that is, at best temporary and at worst may be illegal in some communities--local ordinances should be checked before live trapping. Relocation creates a population imbalance in the territory of squirrels in which the relocated animals are released, and since squirrels are highly territorial, the new squirrel will not be accepted in a new community. In addition, when an animal is removed from a habitat, a vacuum is created, attracting a new squirrel to "set up shop" where the previous one lived. For more detailed information and fact sheets on squirrels, go to Squirrel Damage to Trees.

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