When a sea eagle soars over a fjord, you can spot it instantly: huge dark wings held out flat, a wedge-shaped pure-white tail, and a yellow beak almost the size of a small banana. They mostly fly low over the water, watching for fish.
Their hunting trick is amazing. The eagle dives at the surface of the water and snatches a fish out with its claws (called talons) - without slowing down. Then it lifts off again, the fish wriggling in its grip. They mainly eat fish, but they also catch seabirds and sometimes small mammals.
Sea eagles build the biggest bird nests in Europe. A nest sits on a cliff or in the top of a giant tree, and a pair will use the same one year after year, adding more sticks each time. Some nests are over 2 metres wide and weigh more than a child.
By the 1960s, sea eagles had almost died out in many parts of Europe because of pollution and hunting. Norway protected them, and the numbers slowly grew. Today, Norway has so many that some birds have been carefully moved to Scotland and Ireland to bring back populations there.