Bonelli's Eagle

Bonelli's Eagle is a medium-large, powerfully built eagle of hilly and mountainous terrain, ranging from the Mediterranean basin across the Middle East to South and Southeast Asia. Adults have dark brown upperparts with a distinctive pale, whitish patch on the upper back, and whitish underparts finely streaked with dark brown on the breast.

The tail is relatively long and pale grayish with a broad, dark terminal band, and in flight adults show dark trailing edges and dark carpal patches on the underwing. Juveniles differ noticeably, with plain rufous-buff underparts lacking the streaking of adults.

Key field marks

• Pale, whitish patch on the upper back, visible on adults
• Whitish underparts finely streaked dark brown on the breast (adults)
• Long tail with a broad dark terminal band
• Dark trailing edge and carpal patches on the underwing in flight
• Juveniles: plain rufous-buff underparts without streaking

Similar species

The Golden Eagle is notably larger, lacks the pale back patch, and has golden nape feathers rather than a pale back. The Booted Eagle is much smaller and shows different underwing patterns with pale "landing light" patches. Overall structure, flight style, and the pale back patch are the most reliable clues for adult Bonelli's Eagles.

Range

Bonelli's Eagle is found from the Iberian Peninsula and the wider Mediterranean basin eastward through the Middle East and Central Asia to South and Southeast Asia.

Habitat

It favors hilly and mountainous terrain with cliffs for nesting, combined with nearby open ground, scrub, or light woodland for hunting.

Migration

Most populations are resident and sedentary, defending the same territory year-round, though some individuals, particularly younger birds, may disperse or make local seasonal movements.

Hunting and feeding

Bonelli's Eagle is a fast, agile hunter, typically flying low and fast to surprise prey at close range. It preys heavily on rabbits and gamebirds such as partridges, as well as pigeons and other birds, sometimes hunting cooperatively in pairs.

Voice

It is largely silent outside the breeding season, giving sharp, yelping calls near the nest during courtship and territorial disputes.

Nesting and breeding

Pairs nest on cliff ledges, and occasionally in large trees, building a substantial stick nest that is often reused over multiple years. Breeding pairs are territorial and sedentary throughout the year.