Waterworlds: Stickleback & Beaver - Wild Holland 1/2 - Go Wild

The delta is introduced through the fascinating migration of the stickleback. This epic journey is captured for the first time on film, from the starting point in the North Sea through sea locks to their breeding grounds far upriver in a beaver pool. There we follow the work of a beaver family as they build dams and cut down trees to shape a new landscape. This is not only provides an ideal breeding ground for the stickleback, but also an expanding home to scores of new creatures, including the ring necked grass snake.