In the wild these ducks are easily spooked by people and it's really hard to get near them. However in the city they will often learn to associate people with food and they won't be so nervous. They do like eating scraps of bread but I don't think that's very good for them. In fact I'm not a big fan of feeding any wild animals, especially since bread is harmful for many critters.

They breed when conditions are good, which means the times when there's lots of food and water.

This Grey teal looks like a Pacific Black duck, except it lacks
the Pacific Blacks' stripe across the eye

What they look like
The photos on this page describe these birds better than I can. Being a common duck throughout Australia chances are most Aussies have seen some. I suppose the notable features are the mainly dark brown feathers which are each edged in light brown, and a stripe running through the eye. And something I've been dying to say: Looks like a duck, swims like a duck and quacks like a duck.

Heavy rains and abundant plant growth in early 2008 brought on the breeding of several Pacific Black ducks in Sydney's Centennial Park. The ducklings are surprisingly strong swimmers

What they eat
They might pick up the odd small water critter but these ducks are mainly seed eaters, a feature which has not endeared them to rice farmers. However it seems that these ducks don't eat much of the farmers' crop.