Tarantula

As the world’s largest spiders, tarantulas are both feared and beloved. There are more than 850 species of these often hairy, nocturnal arachnids. Tarantulas live primarily in the tropical, subtropical, and desert areas of the world, with the majority found in South America.

Description
The largest spider on earth, some are known to have a leg span as wide as a dinner plate. Tarantulas have been known to hunt and prey upon small birds, rodents, and snakes, a credit to its ferocity when compared to most arachnids who flee from such animals. They can defend themselves with their powerful fangs, as well as by kicking a cloud of tiny, barbed hairs off of their abdomen to irritate and disorient attackers, and they can grapple with their prey with their strong and flexible pedipalps, which look like a 5th pair of legs near its head. Whenever attacked, creatures with a Tarantula’s tail in your army will release a cloud of barbed hairs which will irritate and disorient any attackers near them, temporarily eliminating any organizational benefits those creatures possessed, such as hunting as a Pack, or moving defensively as a Herd.