Swooper
As leaves and exoskeleton are tough to process without teeth, a population of J. heteropteryx split off and started to improve on its mouth. The swooper, like its ancestor, ranges between 50-65 cm in total length. It is distinguished by two new traits--crests used in sexual selection, and "teeth".
Like its ancestor, while hunting, the swooper--after distracting its prey with loose vegetation--catches its prey by swooping down from the branches at high speed, snatching the small creature in its mouth before making its way back up into the treetops, where it feasts; with the new features in its mouth, it has a far better grip as well, so these hunts are successful more often. It also eats the leaves of various polyphs in its environment, just like its ancestor.
The swooper has also developed a radula-like structure, that is comb-like growths on its tongue and palate made of keratin which it uses to more efficiently process its food, shredding leaves and exoskeleton by moving its tongue back and forth. If one were to look inside its mouth, it would almost look like it was filled to the brim with teeth--though, the radula are not true teeth at all. This makes it much easier for it to digest the food it eats, making it far more efficient than its ancestor.
Like its ancestor, the swooper lays soft-shelled eggs in nests up in trees.
It is sexually dimorphic, with the males being brightly colored compared to the females; it has additionally developed keratinized crests on each eyebrow, which are brightly colored in the males, the quality of which makes a decent indicator of how much protein it has in its diet, even in the females; it was initially selected for because of the extra color literally popping out in males, which with how colors were already seen as sexy basically made the first male with the crests get a lot of game. As it inherits an ancestral ability to hear and vocalize, it locates potential mates with a high-pitched mating call.
The swooper feeds on all of the same things as its ancestor, and due to its radula granting the ability to chew it is far better at processing food than its ancestor was.
