The Savanna Hawk (*Buteogallus meridionalis*) is a striking raptor of open tropical grasslands and marshes, ranging from Panama to Argentina. Unlike typical buteos, this hawk is notably long-legged and often stalks prey on the ground, behaving more like a caracara than a soaring hawk. It has a robust, rufous-brown body with a pale, streaked chest and a distinctive black-and-white banded tail, while its bare facial skin and legs are a vivid yellow. A unique feature is its preference for hunting in the wake of wildfires, where it swoops in to seize fleeing insects, reptiles, and small mammals. Its specialized, deeply notched beak also allows it to efficiently tear into tough prey, including venomous snakes, making it a formidable and adaptable predator of the savanna.

Faits amusants

The Savanna Hawk has a bizarre habit of deliberately setting fires by carrying burning sticks from wildfires to unburned areas, flushing out insects, lizards, and small mammals for an easy meal. It often hunts on foot, striding through tall grass like a roadrunner rather than relying solely on aerial attacks. Its long legs, unusual for a hawk, are adapted for wading in shallow water to snatch frogs and fish, and it will occasionally steal prey from other birds by harassing them in mid-air. During the breeding season, pairs perform a synchronized sky-dance where they lock talons and tumble downward together, only breaking apart just before hitting the ground.

Habitats et répartition

The Savanna Hawk inhabits open and semi-open landscapes, primarily tropical and subtropical savannas, grasslands, and marshes. It is also found in palm savannas, flooded grasslands, and along the edges of gallery forests, but avoids dense, humid rainforests. Its distribution spans a broad geographical range across Central and South America, from southwestern Costa Rica and Panama, through Colombia, Venezuela, and the Guianas, then southward across much of Brazil, Bolivia, Paraguay, and into northern Argentina. It occurs east of the Andes, with isolated populations also present in the llanos of Venezuela and the pantanal of Brazil.

Comportements & Reproduction

Savanna Hawks are typically solitary or found in monogamous pairs, maintaining a stable bond during the breeding season. Their courtship involves aerial displays, including mutual circling and calling, with the male often presenting food to the female. Nesting occurs in the dry season, with both sexes constructing a large stick platform high in a tree, often reused and expanded annually. The female usually lays a single egg, an unusually small clutch for a raptor, which she incubates for around 40 days while the male provides food. After hatching, the chick is brooded closely and fed by both parents, fledging after roughly two months but remaining dependent on the adults for several more weeks. This extended post-fledging care is a key reproductive strategy, ensuring the single offspring acquires sufficient hunting skills before dispersing.

Alimentation

The Savanna Hawk is an opportunistic carnivore with a remarkably broad diet, primarily hunting small mammals like rodents and rabbits, as well as reptiles such as lizards and snakes, which it often captures by walking on the ground rather than stooping from the air. A particularly interesting aspect of its feeding behavior is its heavy reliance on large insects, including grasshoppers, beetles, and caterpillars, especially during the wet season when these prey are abundant. It also frequently takes birds, frogs, and even fish from shallow water, and it is known to scavenge on roadkill or follow wildfires to catch fleeing animals. Uniquely among many raptors, the Savanna Hawk often hunts on foot, striding through open grasslands and marshes with a deliberate, stalking gait, and it will sometimes subdue larger prey by drowning it in water.

Couleurs

The Savanna Hawk has a mostly rufous-brown body with fine, dark barring on its chest and belly, a pale buffy throat, and a distinct black-and-white banded tail. Its underwings are strikingly patterned with black flight feathers contrasting with white coverts, and it has a pale, unmarked crown. These colors provide camouflage in the dry savanna grasslands and open woodlands it inhabits, blending with the earth tones and dappled light.