How to keep squirrels away
You can prevent squirrels from climbing isolated trees and utility poles by encircling the poles with a two-foot wide collar of smooth metal six feet above the ground. Attach the collar with encircling wires held together with springs to allow growth. Trees adjacent to buildings should be trimmed to prevent squirrels from jumping onto roofs.
Squirrels can be prevented from traveling on wires by installing two-foot sections of lightweight, 2- to 3-inch-diameter plastic pipe. Slit the pipe lengthwise and place it over the wire. The pipe will rotate with the weight of the squirrel, causing it to tumble. WARNING: due to the danger of electrical shock, this should only be attempted by a qualified electrician or a representative from your utility company.
Squirrels can be excluded from buildings by closing all openings with 1/2 inch wire mesh or by making other necessary repairs. However, care must be taken to ensure that no squirrels are unknowingly kept inside the building. They would die if trapped inside an attic. If it isn't possible to remove young squirrels, exclusion efforts should be delayed until the young have matured.
"Predator scent", which is mountain lion poop and is sold at Sonoma County Wildlife Rescue in Petaluma (707-992-0274) can temporarily discourage squirrels from entering attics and other enclosed areas. Supplement this method by lighting the attic. A house cat may further discourage squirrel activity
Animal Information
Squirrels
Gray squirrels are among the most commonly observed animals. They can be found in residential areas in almost any town or city. Generally squirrels are non-intrusive - they are a pleasure to observe and here in Sonoma County rarely present a problem due to high populations.
Food Attractants
Conflicts can occur when humans and squirrels live in close proximity. Squirrel feeding can result in the loss of sweet corn, tomatoes, and other vegetables from your garden. High squirrel populations also can affect commercial nut production, especially walnuts and pecans. Squirrels sometimes dig and eat flower bulbs and newly planted seeds. Bird feeders also attract squirrels. Squirrels are very clever problem solvers, known for feats of skill and dexterity that amazes humans.
Occasional problems caused by squirrels
When squirrels enter homes, they can become destructive because of gnawing habits and collections of nest materials. Exterior siding and wiring sometimes is damaged by their gnawing. In addition the clatter of squirrel movements within the structure can be bothersome.