Skunks are on the smellier end of our critter list.  They are members of the Weasel family and is similar in size to a house cat.  Skunks tend to live in old Woodchuck burros or low protected areas like under your deck. Skunks love to dig little divots in areas where grubs are found, for example, possibly your lawn.  They do most of their activities during the nights.  When these guys are startled or feel threatened they will spray in defense.  Their bodies can hold up to 5-6 sprays at one time but ironically they do not like their own odor.  Skunks will generally leave an area where they recently sprayed until the smell has dissipated.