translation.en: What they found out is that these birds started nesting in the winter as the water drew down, because they're tactile feeders, so they have to touch whatever they eat.
translation.zh: 他们发现： 这种鸟在冬天 水位下降的时候开始筑巢， 因为它们是感知型的进食动物， 必须通过触碰食物。