In the raupo, where the stems are thick and the water is dark, a bird moves that you will probably not see. The fernbird. Brown and streaked, with a long tail carried at a jaunty angle. It looks like a wren that has been stretched. This visual distortion helps it navigate the dense cover it requires. The bird lives in wetlands, scrublands, and flax bushes. It needs this density. It does not like open spaces. It skulks and hides. It is easier to hear than to see. This secrecy is a survival strategy. The song is a series of sharp, metallic notes. Chick-chick-chick-chick-chick. Then a pause. Then again. It sounds like someone tapping two stones together. Once you learn it, you will hear it everywhere. The sound marks the presence of the bird. It signals activity in the reeds. Feeding involves insects. The bird picks them from leaves and stems. It does not fly far. It hops and flutters from one perch to the next. This limited mobility defines its range. It stays close to cover. The nest is a deep cup, woven from grass and leaves. It is hidden in dense vegetation. The female lays small, speckled eggs. The chicks are pink and demanding. They grow fast. Survival depends on speed. The parents work hard to keep them fed. The fernbird is declining. Wetlands have been drained. Scrublands have been cleared. The bird has lost habitat. It is not threatened, not yet. But the numbers are down. The loss of cover exposes it to predators. Rats, cats, and stoats take their toll. Changes in water quality and hydrology also affect populations. A true endemic that would not be caught dead anywhere else. The population is estimated at 50,000 to 100,000 birds. Numbers are declining in many regions as wetlands continue to be drained and degraded. Strongholds are limited to large, intact wetland systems. In the raupo, where the stems are thick and the water is dark, a bird moves that you will probably not see. The fernbird. Still here. For now. It carries on.