A second one is now visible at the lakeshore through the reed. The first one is dabbling. The underwater parts are visible, too.
… where Cueganzzle are looking?
Spoiler:
They are looking north, at the “cave”, again facing us. (Ms. Frizzle doesn't understand what Cuegan are saying, but she understands that they are discussing the connection between the lake and the cave. That's good. She won't interrupt them.)