I've had hours of fun with them. One particular sunny afternoon, I kept a pair of them talking up to the point when the rest of the troupe had covered all the neighbourhood, and then gathered in a group at the end of the garden, trying to attract the attention of the pair, so they could all get back into the bus and go home for their tea.
Be nice! They don't mean any harm, really...
Quack!
GtD.