Overview: This episode covers life in streams, puddles, lakes and rivers including the various stages of the development of rivers from their headwaters right through to the deltas. Also covers the effects of silt, erosion, rocks, waterfalls and other natural features. Includes larvae, water birds, reptiles, fish, pelicans, cormorants, snakes, fresh-water seals, otters, crocodiles, turtles and much more.