In 2012 Apple decided to drop YouTube from the set of native apps with introduction of iOS 6 and soon after Google released its own app, which since has gone through 11 major iterations and today proudly sits on the third place of the Top 10 Most Popular iOS apps.
Some species of squirrels may claim as much as 10 hectares of territory. Because of the high density of squirrels in most habitats, there is sometimes significant territory overlap. Squirrels mark their territory with urine and tail-waving displays, and they may bark warning calls at passing intruders, including humans.
None of the tree squirrels hibernate, but they do have periods of reduced activity during severe cold weather. Fox squirrel (Sciurus niger): The fox squirrel is the largest tree squirrel in Illinois, weighing one and three-quarters to two pounds with a length of 19 Â½ to 22 inches.The fur is a mix of rusty-yellow with black with an overall reddish cast.outhern flying squirrel (Glaucomys volans): The southern flying squirrel is the smallest tree squirrel in Illinois weighing approximately two ounces with a length of eight and five eighths to nine and three quarters inches. The fur is glossy gray to cinnamon on the back and white on the belly.