translation.en: And what they found out is that these birds' behavior is intrinsically tied to the annual draw-down cycle of water in the Everglades, the thing that defines the Everglades watershed.
translation.zh: 他们的研究发现 这些鸟的行为， 本质上与大沼泽地每年水位下降 及流域一切的循环周期息息相关。