大象传媒

Barnaby Bear rides his bike along the banks of the River Thames. He meets Alistair, a river warden, who is looking for mussels and snails. Alistair explains how these creatures eat dirt and muck from the bottom of the river. At a wetland area, Barnaby and some children look at a pond snail, dragonfly larvae, worms, a beetle and a crayfish. These creatures like to live in the reeds, which also make important nesting sites for birds.