At least one pair of swans on Lady Bird Lake have a little game going. They hang out at the shore of Auditorium Shores (a leash-free area) and bait the dogs. They hiss and flap until one ventures into the water, then they swim away from shore until the dog turns back, then chase the dog back to shore.
They'll do this circle to and from the shore until the dog tires out and gives up. The swans may not do it with more aggressive dogs, but The Stink Factor's been playing with them for over a year now.