I love photographing raptors. Let me introduce the Black and Chestnut eagle. The Black-and-chestnut Eagle (Spizaetus isidori) is a striking and powerful raptor native to the montane forests of South America.
This bird is known for its distinctive plumage, which combines deep black and rich chestnut tones, making it one of the most visually impressive eagles in the region. The Black-and-chestnut Eagle is a large bird, with a wingspan that can reach up to 160 cm (about 5.25 feet) and a body length of around 70 cm (27.5 inches).
As its name suggests, the eagle’s plumage is a combination of black and chestnut. The head, back, and upper wings are predominantly black, while the chest, belly, and the underside of the wings are a rich chestnut. Its tail is banded, with alternating black and white stripes.
Like other eagles, it has a powerful, hooked beak and strong talons, both of which are essential for hunting. This eagle is found in the Andean regions of Colombia, Ecuador, Peru, and Venezuela, and in the montane forests of Bolivia and northern Argentina.
It primarily inhabits cloud forests and other high-altitude, densely wooded areas. These environments provide ample cover and prey for this elusive predator. The Black-and-chestnut Eagle is a carnivore, primarily preying on medium-sized mammals and birds, including monkeys, sloths, and large birds like guans and curassows.
Its hunting technique involves soaring high above the canopy before swooping down with incredible speed and precision. This eagle is typically solitary and known for its secretive nature.
It spends a lot of time perched quietly in the forest, scanning for prey. When it does take to the skies, it does so with powerful, slow wingbeats, making it a majestic sight.
The Black-and-chestnut Eagle builds large nests high in the canopy, often in the fork of a tall tree. These nests are used year after year, with the eagle adding new material each breeding season.
The species is considered Near Threatened by the IUCN due to habitat loss and fragmentation, as well as hunting. Deforestation in the Andean region poses a significant threat to its population. Conservation efforts are focused on protecting its habitat and raising awareness about the eagle’s role in the ecosystem.
There is only an estimated 250 birds left in the world, making them critically endangered.
Fun Fact
The Black-and-chestnut Eagle is sometimes referred to as the “Isidor’s Eagle,” named after Isidore Geoffroy Saint-Hilaire, a French zoologist who made significant contributions to the field of natural history.