Tarantulas are a breed of spider that is commonly found throughout areas of America, Africa and Europe. Most species of Tarantula are not dangerous to humans and are even popular within the exotic pet trade. Some Tarantulas will mainly eat insects and other spiders, however larger highly toxic breeds can kill prey as large as lizards, mice, birds and snakes. Some species hunt prey in trees while others hunt on or around the ground. Tarantula s vary in size; some as small as a finer nail, while other are larger than a dinner Plate!