a couple tries from different sites to make sure. It always seemed like the people on the purple boats were the most receptive. Sitting in traffic, or on any of my many jobsites i oversaw, with a yell of 'quack' would always eleict the best response of (purchased for the rise) duck calls.
![](http://www.gonomad.com/family/0807/boston-images/Boston-Duck-Tours.jpg<P)
![](http://resources.tourcorp.com/images/bos_ducks/boston_duck_tour_splash.jpg)
![](http://images.reserve123.com/product/1144-1.jpg)
If you have never been to boston, or even if you've walked the entire freedom trail and never taken a duck tour, i absolutely reccomend it.