Fork island

Two main features are apparent when entering this island. The first is the thin and tall bifurcated groundsels with their forked leaves. The second is the cacophony of noises. The buzzing of insects, the winds rustling the leaves, and most importantly the Lyre birds.
The Lyre birds sing their songs, attempting and succeeding in being the lead vocals. They yell their sharp pitches for a variety of reasons. They concuss any predatory birds foolhardy enough to hunt them. They make beautiful melodies to attract mates and use their volume to scare off the competition. But possibly most important of all, through their mastery of pitch and recreating any sound imaginable they can play the key song of the leaves of the forked groundsels.
The leaves of the forked groundsels act as super precise tuning forks. Each leaf has a specific tone, pitch, and decibel that will activate it. Once activated the leaf will frantically vibrate and eventually fall off the tree. These forked leaves are a major source of nutrition for the forked lyrebirds.