In the Canada pavilion next to the waterfall, we watched a female duck make her way from the lower level to the upper via the steps. It was quite a climb and she could have much more quickly flapped her way up there, but no, she industriously hopped up one step, then the next, then the next, all the way to the top. There was a male duck standing at the bottom level, looking around and giving little "where are you" quacks. We tried to tell him his lady had gone upstairs, but I guess we didn't speak duck!