The gringlo split from the pleeduh. Unlike its ancestor, the gringlo has become more heavily-built, but it can still run quite fast. A distinguishable feature is the large wooden teeth it has evolved, which can easily tear and crush anything it bites. Whenever the gringlo cannot find its usual prey, it will switch to an opportunistic lifestyle and eat almost anything, including the fuzzstalk and even a full-grown falsequill sauceback. Another essential adaptation is that it lives in packs of 3-5, which are led by both a female and male. It has also become slightly more intelligent, which allows it catch more prey, to be less hostile towards each other and members from different packs, and to play with their young.
The patch of skin its ancestors had has evolved into an actual, separate toe, which allows it to crawl on the ground more efficiently. The gringlo has a wooden spike on the back of each leg that are used to slash prey when it leaps on them. The gringlo has also developed wooden spikes on the "flaps", which are used to slash predators approaching from behind. The gringlo is usually awake in the evening and it falls asleep at dawn. Another important evolution is that it has a stronger immune system, which allows it to eat dead or diseased creatures. The gringlo can also swim for short distances and can hold its breath for up to 3 minutes. It usually makes a small burrow for its home, but it will live in abandoned trowelhorn gulper burrows.
When a gringlo is mature enough, it leaves the pack forever to start a new one. The males display their leaves to attract mates; the brighter, the healthier. The females wrestle to display fitness and strength. After mating, the gringlos begin their own pack. They give birth to 2-3 offspring, they each take turns in raising the offspring and hunting.