What is this? A mod making a creature thread?
Anyway, here is an Oifan (OY-fahn):

The Oifan's locomotion is similar to that of kangaroo. Their main head consists of two large forward facing eyes and two internal ears. This is also where their main brain is. Their two mouths branch off at the base of the main neck, creating two more necks, on for each mouth. Each of the secondary heads also houses a secondary brain and is where their nostrils are. Their two arms end in highly dexterous ape-like hands and that they knuckle-walk on when walking. Their thick tail is about the same length as the rest of the body. They are about 6 feet (2 meters) long from mouth to tail.
And here is an Umtag (OOM-tahg):

The Umtag have the same basic form except that they also grow a horn once they grow of reproducing age. Their secondary brains are also much smaller. They run and walk on all fours, and cannot use their front limbs to grasp anything. Instead, they use their two mouths. They stand about 4 feet (1.25 meters) tall at the shoulder.
How they relate:
The Oifan and Umtag are two genders of the same species. They have evolved to look very different from eachother. Once a year the Umtag seek out the Oifan. They each have a growth that forms below the eyes on the main head. That is what they call a "seed." The Oifan will dig a hole about a foot (.33 meters) across and deep. They each remove their seed (it comes off painlessly and leaves no scar) and place them in the hole (the Umtag's resting on top) and bury them. The two seeds then combine to form a new seed. This new seed grows into what looks like a plant. They call this plant the Egg Tree. The Oifan take care of this plant for a full year as it grow to form a single egg. Picture here:

By the end of the year an egg about 1 foot in diameter will have grown. The Umtag now come back and wait for the eggs to hatch. If the infant is an Oifan, it stays there to grow up with the Oifan. If it's an Umtag, it goes back with them. Pictures of an infant Oifan and Umtag:


The Oifan and Umtag are mostly monogamous.
They live on their planet, Hagunda (ha-goon-DAH), which in their language means "Incubator." Political map:

Biome map:

A time line map of the political history of Hagunda:

I have more, but I feel like taking a break, so feel free to ask questions.
Note: To enlarge all pictures (except maps) simply click on the picture.