Here's a breakdown of their relationship:
* Camels: These are found in the Old World (Africa and Asia). They are large, even-toed ungulates with long necks, long legs, and humps on their backs.
* Llamas and Alpacas: These are found in the New World (South America). They are smaller than camels and lack humps.
* Vicuñas and Guanacos: These are the wild relatives of llamas and alpacas. They are smaller than llamas and have long, slender legs.
While camels, llamas, and their relatives look different, they share many physical and genetic similarities. They have a similar digestive system, a unique double-layered stomach that allows them to digest tough plant matter, and they can survive in harsh environments with limited water.
Scientists believe that the ancestor of all camelids originated in North America and migrated to Asia and South America via land bridges. This is why we see these closely related animals living on different continents.