Observing the Fernbirds nesting in our wetland we discovered that the sitting parent, after about half an hour on the nest, sneaks about 5 metres away from the nest through the rushes then flys off to a point some distance away then calls. It seems like it is calling “Your turn.” The mate answers then flys in and sneaks back through the rushes to the nest where it again sits on the eggs. This happens regularly about every half hour.
Also yesterday evening after 7pm we stood on the boardwalk and watched numerous pairs of Matata calling and moving about through the rushes and flying. As secretive as they are they cannot help themselves. They just have to have a look and see who is watching them so they pop up onto the tops of the rushes or ribbon wood.