There are more than 200 squirrel species worldwide, ranging in size from the five-inch African pygmy to the behemoth Indian giant squirrel. They have four front teeth that grow continuously, at a rate of about six inches per year so electrical lines are no match for squirrel teeth, which have been blamed for hundreds of power disruptions yearly. Adult squirrels normally live alone, but they sometimes nest in groups during severe cold spells. Squirrels, like many rodents, can’t vomit. The average adult squirrel needs about a pound of food per week and some squirrels collect old rattlesnake skin, chew it up and then lick their fur, creating a kind of “rattlesnake perfume”. Squirrels communicate using complex systems of high-frequency chirps and tail movements.
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