🦅 Raptors
The harpy eagle (Harpia harpyja) is one of the most impressive birds on Earth. The female — larger than the male, as in most raptors — can reach a body length of 1 metre, a wingspan of 2 metres, and a weight of up to 9 kilograms. Its talons — the primary hunting weapons — are approximately the size of a grizzly bear's claws. It is the national bird of Panama, revered as a symbol of power and freedom across its range from southern Mexico to Bolivia and Brazil. It is also a specialist of the closed tropical forest canopy — a habitat that is being lost at accelerating rates across its entire range.
maximum recorded female body weight
wingspan
prey species documented
between breeding attempts
Most large eagles soar over open country, using thermals to gain altitude and spotting prey from great heights. The harpy eagle has evolved a fundamentally different hunting strategy — navigating through the closed forest canopy at speed, using its relatively short but broad wings to manoeuvre between trees, and relying on powerful acceleration rather than prolonged soaring flight. Its facial disc — the circle of feathers around its face — functions like a satellite dish, directing sound toward its ears and enabling precise acoustic location of prey moving through the canopy. These adaptations make it superbly suited to hunting in dense forest — but dependent on intact, large areas of primary forest to find sufficient prey.
The harpy eagle's prey list is remarkable in its breadth and ambition. Primary prey includes two-toed and three-toed sloths — which, despite their apparent defencelessness, make up a substantial proportion of the harpy's diet in many areas. Howler monkeys, spider monkeys, and capuchin monkeys are also frequently taken. Coatis, kinkajous, large iguanas, and even small deer have been documented as prey. The eagle hunts by perching silently in the forest canopy, often at a height of 30-50 metres, watching and listening for prey movement below, then launching a rapid pursuit through the canopy to strike before the prey can reach cover. Successful hunts may involve striking prey from branches or even snatching animals from mid-air as they leap between trees.
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Dr. Cruz has spent 16 years studying the extraordinary biodiversity of Neotropical and Southeast Asian rainforests — from jaguar predation behaviour to orchid pollination ecology. Her research examines how tropical species interact, how ecosystems function, and what biodiversity loss means for forest resilience. She draws on data from IUCN, WWF, and Conservation International.