The dust could very well be helpful, it isn't a bad way to cover tracks. Hawke looks around to try and see if they could hide. It'd be pointless to climb a tree, they could fly, and she didn't know of any caves. Oh! She had an idea.

"Follow me." She'd been here long enough to get a sense of the place. She might be doing fine so far, but sooner or later she was going to need to breathe. "I don't know, can't think of any theories myself." Hawke's running with specific tunnel vision now, and she doesn't really warn him. She's led them right to one of the deeper parts of the river and jumped in without a moment's hesitation. Clothes can dry. Crazy insects probably can't.