Quills have sharp tips and overlapping scales or barbs that make them difficult to remove once they are stuck in another animalâs skin. Porcupines grow new quills to replace the ones they lose. From the tip of the nose to the end of the tail, a porcupine can be from 33 to 46 inches (80 to 115 cm) long. They can weigh from 12 to 35 lbs (5 to 16 kg). Porcupines make shrill screeches, whines, and low grunts to communicate. Porcupines are nocturnal, which means they are active primarily at night.
1 Wood pellets at $250/ton cost about $18 per million BTU, which is a savings of $25 per MBTU vs. heating oil at $2.91/gallon.  That means for every ton of wood pellets you use, youâll save approximately $100 per ton, even before the additional savings possible through efficiency gains.
Under normal usage, they consume about 100 kilowatt-hours (kWh) or about $9 worth of electricity per month. The loss of electric power, unless the stove has a back-up power supply, results in no heat and possibly some smoke in the house. Stove and fuel costs. Most pellet stoves cost between $1,700 and $3,000. However, a pellet stove is often cheaper to install than a cordwood-burning heater. Many can be direct-vented and do not need an expensive chimney or flue. As a result, the installed cost of the entire system may be less than that of a conventional wood stove. Pellet fuel is normally sold in 40 pound (18 kg) bags at about $3.00 to $4.00 each, or about $120.00 to $200.00 a ton. You can estimate how much fuel you will need for a heating season by noting that one ton of pellets is equivalent to approximately 1.5 cords of firewood.