Picture a pond in your mind. What do you see? Frogs on lily pads and a few ducks a-dabbling? Or shrimps, dragonfly larvae and diving beetles scurrying around beneath the surface? Perhaps you see your ornamental goldfish being eyed up by a hungry heron. Whatever the picture in your mind, you will have imagined a fairly small area of still, fresh water. Ponds come in all shapes and sizes but are smaller than lakes and don’t have flowing water like a river.