The Giant Amazonian Centipede - Scolopendra gigantea
Like the other members of Scolopendra, the giant Amazonian centipede is predatory and venomous. The first body segment has a pair of modified legs terminating in sharp claws, called forcipules (you know, like forceps), which it uses to pull its prey to its mouthparts, where it injects its venom.
Though typically non-fatal to humans (excepting those allergic to the venom toxins), giant centipede bites are incredibly painful and can cause symptoms for days on end. This venom is what allows them to hunt prey as large as small mammals and birds, without itself being eaten.
I have no idea what people are thinking when they buy one of these, but they’re apparently a big thing in exotic insect circles. They’re known to be jumpy, nervous, and very aggressive both in the wild and in captivity, and can often escape enclosures that aren’t well-sealed. I mean, come on. Even tarantulas can be docile and friendly. And mantises are fun to watch and not venomous! And there are so many other options! Why a giant centipede?
Vivarium Naturae; or, the Naturalist’s Miscellany. George Shaw, 1790.