The acidfoot weavesnapper replaced it's ancestor the weavesnapper on Truteal Island. When the acidfruit megaplage evolved on Truteal Island, the soil and water became very acidic, and many species went extinct. Thus it had to adapt, and did so by having their skin and digestive tract evolve to cope with, and in some cases even neutralize, the acids. For instance, the skin on their feet has thickened and webbed, with soles capable of resisting acidic burn, allowing it to walk freely on the toxic landscape.
It is 3 times a big as it's ancestor due to island gigantism, and has re-developed a strong jaw and sharp teeth in order to catch a bigger variety of prey, like the helmeted uksip and bloody nose cotingo. This has enabled it to become the top predator of Truteal island. It has also evolved primitive ears capable of detecting some vibrations and sounds, like those of it's own species. It has also developed a sexual dimorphism; males have feathery crests that can move up and down, as well as rings on the tail for attracting mates; females have neither.
It has also found a way to climb up and build their nests on top of acidfruit megaplages. First, it has evolved longer claws on it's wings and feet in order to scale the toxic flora. Second, thanks to it's digestive tract's immunity to the acidfruit megaplage's toxins, it can dig into the megaplage's fruity top, carving a depression with it's claws, where it will then create and weave together a nest using nearby plant material. In there offspring will hatch and grow, and those that can create good enough immunities to the acidfruit megaplage will survive into adulthood. They live to be about 15 years.