Wolves are common to all parts of the Northern Hemisphere. They are usually shy and cautious around humans but unlike the dog, have not been domesticated at all. The most common type of wolf is the gray wolf, or timber wolf.dult grey wolves are 4 to 6.56 feet (120 to 200centimeters) long and weigh about 40 to 175 pounds (18 to 79 kilograms). Just like its name, the gray wolf typically has thick gray fur, although pure white or all black variations exist. Another common species, the red wolf, is a bit smaller.
As Bill Gates recently pointed out, that killer is the mosquito. No other species, including our own, is responsible for the loss of as many human lives each year as mosquitoes are, Gates continues. Humans murder around 475,000 other people each year. Snakes kill around 50,000, while dogs (mainly from rabies transmission) claim another 25,000 lives.
1 Vector-borne diseases account for more than 17% of all infectious diseases, causing more than 1 million deaths annually. 2  More than 2.5 billion people in over 100 countries are at risk of contracting dengue alone.  Malaria causes more than 600 000 deaths every year globally, most of them children under 5 years of age.