Eagle catching fish

Eagles are birds of prey known for their impressive fishing techniques, which vary by species and habitat.

About this subject

Eagles are aerial predators that rule both the skies and waters. Species such as the osprey (Pandion haliaetus) and the bald eagle (Haliaeetus leucocephalus) are notable examples of birds specialized in catching fish. The osprey, for instance, has reversible talons and special scales on its feet to grip slippery prey. It dives from heights of up to 30 meters, extending its legs to snatch fish near the surface. The bald eagle, national symbol of the United States, uses a different approach: it flies low over the water and grabs fish with its powerful talons, often stealing prey from other birds.

These birds are found on almost every continent except Antarctica. In Brazil, the osprey is a seasonal visitor, observable along coastal regions and in large Amazonian rivers. Another Brazilian species is the harpy eagle (Harpia harpyja), which rarely fishes, but when it does, it uses its strength to catch large fish in forest streams. The fishing technique of eagles is influenced by their sharp vision: they can see ultraviolet light and detect subtle movements in the water, such as the shine of fish scales.

Interestingly, the osprey builds nests near water bodies, often on artificial platforms. Studies show that these birds can dive accurately even in murky water, adjusting wing position and attack angle to minimize drag. Successful capture depends not only on speed but also on the ability to assess depth and fish direction. In some regions, like Norway, white-tailed eagles (Haliaeetus albicilla) are famous for following fishing boats to feed on discarded remains.

The relationship between eagles and fish is an example of evolutionary adaptation. While most eagles are opportunistic, also feeding on carrion or small mammals, species specialized in fishing have developed unique traits. The osprey, for instance, can close its nostrils during dives to prevent water intake. This set of skills makes eagles exceptional aquatic hunters, admired by birdwatchers and nature photographers around the world.

Frequently Asked Questions

Which eagle species is most specialized for fishing?

The osprey (Pandion haliaetus) is the most specialized, with adaptations such as reversible talons and non-slip scales, along with precise high-altitude dives.

How do eagles see fish underwater?

They have ultraviolet vision and can detect the shine of scales and subtle surface movements, even in murky water, thanks to a high density of cones in the retina.

Are there fishing eagles in Brazil?

Yes, the osprey is a seasonal visitor in Brazil, appearing in coastal areas and the Amazon basin. Additionally, the harpy eagle may occasionally fish.