Alkub eggs were once thought to be the only ones on Ark that made a sound. If you put your ear up to an Alkub egg and listen very carefully, you can hear the purring sound of the baby Alkub. The sad part is, once the Alkub is hatched, that purring noise is extremely annoying until it's fully matured as an adult.
Alkub are the most gentle beast in Ark. They are frequently found roaming in the Northern Plains, near the entrance of the Egg Cave. Baby Alkub have a very annoying growling and purring sound, but a fully mature Alkub is a force to be reckoned with.