A cama is a hybrid of two animals from different worlds — camels from Asia, and llamas from South America. The two species exhibit many differences, but camels and llamas are both camelids descended from a common ancestor that evolved in North America during the Palaeogene period.
Camas were produced via artificial insemination to create an animal with the size and strength of the camel, but the more cooperative temperament of the llama. The unlikely fertilization was a success, but the result wasn't quite what breeders had hoped. Camas exhibit a camel-like temperament, but they are attracted to female llamas. (Proof that opposites really do attract!)