Jillins are 60 cm long omnivores that live among the branches of trees. But not just any ordinary tree of Toci1. Their main habitat is a giant frame of solid branches and vines that grow as tall as a mountain. Long ago, Toci1 had a its own share of mountain chains but they have eroded away nearly completely (possibly due to a period of extreme weather). There was a species of plants however that grew at great speed and dominated the mountains and solidified. Although the mountain vanished, the plants remained, creating giant "aviaries".
Having been tree climbers throughout their evolutions, the hooveless Jillins were the first to take advantage of the new ecosystem and are one of the most common animals living there. They will eat fruit but also occasionally raid nests of young animals and eggs. The latter that pierced using a single spike growing out of the Jillin's left cheek. That spike is also their navigation organ which helps them find their away in the maze of branches.
Though well at home in the branches, Jillins will descend to the rock solid ground below when they need to mate. The reason for that is uncertain but it may be because in the trees, danger can come from any direction hidden by foliage. The bare rock below on the other hand cannot hide predators and can only come from ground level. Both males and females have large white crests ornamented by long red extensions of skin. When they meet, males and females shake their heads to create noise with the loose skin. If the male can make himself louder than the female, she will let him mate with her.
"Jillins are inspired by an awesome friend that came to visit my city during my high school years. Many of their physical traits are found in this animal, notably the large brown eyes. There's also the spike symbolizing their piercing and the crest is their white hat and red hair. The fact that they live in the mountains is also there. The rest of the design was inspired by Koalas."