Out on a 300-meter-long catwalk over the Yellow Water Billabong, an excited gaggle of birdwatchers track a sea eagle circling overhead with a fish in its beak, with another eagle in hot pursuit.

• 在横越黄水河洼地的300公尺狭窄通道上的另一端，一群兴奋吵闹的赏鸟者正在追踪一只海鸥，牠的嘴里叼著一条鱼，盘旋在赏鸟者头顶，旁边还跟著另一只纠缠不休的海鸥。