Travelling along the river is one of the best ways to birdwatch in the Manu Biosphere Reserve. Rivers provide a break in the all engulfing forest. Areas of changing habitat like this often have higher levels of biodiversity due to the mingling of species from both areas.
Many bird species like herons & kingfishers rely on fish as a food source. So they will spend the majority of their time by rivers and lakes.
Others, such as the plover, rely on the river banks. Here they forage for foods such as crustaceans and worms. You often find their footprints in the sand where they have been looking for food.