Booted Eagle vs Bonelli's Eagle
Hieraaetus pennatus and Aquila fasciata

Booted Eagle
Hieraaetus pennatus

Bonelli's Eagle
Aquila fasciata
Comparison notes
Field marks and practical differences
The Booted Eagle is a compact raptor, similar in size to a buzzard, with feathered legs reaching down to the toes—a key field mark. It shows two main colour morphs: pale birds with creamy underparts and dark wing patches, and dark birds that are uniformly brown. In flight, look for pale shoulder patches and a square, finely barred tail. It is a passage migrant in the UK, most often seen in spring and autumn, favouring open woodlands and forest edges. Bonelli’s Eagle is larger and more robust, with a wingspan noticeably broader than the Booted Eagle’s. Adults display dark upperparts and lighter, streaked underparts, plus a distinctive white patch on the back and a broad dark tail band. Juveniles are reddish-brown above. It prefers rocky, mountainous terrain and hunts medium-sized birds and mammals. Confusion with Booted Eagle is unlikely due to size and habitat differences, but both species share forest and grassland habitats in southern Europe. Photographers in Spain often find Bonelli’s Eagle a dramatic and approachable subject.
Size stats
Compare species by wingspan and weight
- Body length
- 40 - 50 cm
- Wingspan
- 110 - 130 cm
- Weight
- 0.6 - 1.1 kg
- Body length
- 55 - 65 cm
- Wingspan
- 150 - 180 cm
- Weight
- 1.2 - 2.2 kg
Habitats
Where they live
Diet breakdown
What they eat
- Vertebrates80%
- Insects15%
- Carrion5%
- Vertebrates90%
- Carrion5%
- Insects5%
Species notes
Descriptions and photographer notes
Booted Eagle
The Booted Eagle is a small, compact bird of prey about the size of a buzzard. It is known for having feathers all the way down its legs to the toes. There are two main colour types: pale birds have creamy underparts with dark wing feathers, while dark birds are all brown. When flying, look for pale patches on the shoulders and a square-shaped tail with fine stripes. The bird breeds across southern Europe, Central Asia, and parts of Africa. It moves to sub-Saharan Africa and southern Asia during the winter. It passes through Britain mainly in spring and autumn, sometimes staying briefly if it overshoots its usual route. During the breeding season, it prefers open woodlands, forest edges, and wooded hillsides. It hunts over nearby grasslands and scrub, catching small birds, reptiles, and large insects by chasing them low and fast through the air.
Bonelli's Eagle
Bonelli's Eagle is a medium-sized bird of prey with clear markings that help to recognise it. Adult birds have dark feathers on their upper parts and lighter feathers underneath, which are marked with dark streaks. When flying, a distinctive white patch on the back can be seen. The tail has a wide dark band at the end. Young birds are reddish-brown on top with paler, less streaked feathers underneath. The eagle lives in rocky, mountainous areas and wooded hills around the Mediterranean region, parts of southern Asia, and some areas in North Africa. In Europe, it usually stays in the same area where it breeds. This bird is a strong hunter, catching medium-sized birds and mammals with skill as it moves through rough terrain. It often hunts in pairs. The number of Bonelli's Eagles has fallen in some areas, leading to concern for its future in several European countries.