<trp-post-container data-trp-post-id='360604'>Red-legged Seriema

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En bref

  • Scientific Name: Cariama cristata
  • Spanish Name: Seriema patirroja
  • Family: Cariamidae
  • Known Nicknames: Red-legged Seriema, Crested Seriema
  • Average Length: 75–90 cm / 30–35 in
  • Average Weight: 1.5–2.2 kg / 3.3–4.9 lb
  • Envergure : N/A
  • Key Feature: Long, bright red legs and a prominent erectile crest on the head
  • Primary Diet: Carnivore (insects, small vertebrates, snakes, lizards)
  • Range: Central and eastern Brazil, eastern Bolivia, Paraguay, Uruguay, and northern Argentina
  • Habitat: Open grasslands, savannas, cerrado, and dry scrub with scattered trees
  • Social Structure: Usually seen in pairs or small family groups
  • Nesting/Breeding: Stick nest placed in a low tree fork or bush
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Red-legged Seriema (*Cariama cristata*) is a striking, long-legged bird native to the grasslands and savannas of Brazil, Uruguay, and Argentina, often described as a "secretary bird of the Americas" for its terrestrial hunting style. Standing up to three feet tall, it sports a sleek, gray-brown body, a bushy crest of forward-curling feathers, and vivid red legs and beak that give it a distinctive, almost prehistoric appearance. Unlike most birds, the Seriema is a formidable predator of snakes, lizards, and insects, using its powerful legs to stomp prey to death or fling it against rocks—a behavior known as "thrashing." Its most special feature is its loud, far-carrying song, a complex series of yelps and whistles that can be heard over a mile away, often performed in duets to defend territory. With its long tail, expressive crest, and surprisingly terrestrial lifestyle (it prefers walking to flying), the Red-legged Seriema is a charismatic and unique ambassador of the South American pampas.

Faits amusants

Despite being a bird, the red-legged seriema is a surprisingly effective terrestrial predator, often stomping snakes and lizards to death with powerful kicks, then flinging them against rocks to tenderize the meat. Its long, curved claws on the second toe are retractable, acting like switchblades for gripping prey and climbing trees. The seriema also has a bizarre, loud, yelping call that sounds like a manic puppy, which it uses to defend its territory and communicate over long distances. Another quirky habit is its habit of sunbathing with its wings spread wide, a behavior thought to help regulate body temperature and dislodge parasites.

Habitats et répartition

The Red-legged Seriema inhabits open to semi-open landscapes across central and eastern South America, primarily within the Cerrado savanna, the Caatinga dry scrublands, and the Pantanal wetlands. It is strongly associated with grasslands, scrubby woodlands, and gallery forests, avoiding dense, closed-canopy rainforests. Its distribution spans from northeastern Brazil south through Bolivia, Paraguay, and into northern Argentina, with isolated populations also recorded in Uruguay. The species is generally resident within its range, though local movements may occur in response to seasonal flooding or drought.

Comportements & Reproduction

Red-legged Seriemas are typically monogamous, forming strong pair bonds that may last for multiple breeding seasons. Pairs defend large territories year-round, and their loud, far-carrying duets reinforce pair cohesion and warn rivals. Courtship involves mutual preening, chasing, and synchronized vocalizations, with the male often presenting nesting material to the female. The nest is a shallow platform of sticks built in a low tree or shrub, usually 1–5 meters above ground. The female lays 2–3 eggs, and both parents share incubation for about 26–30 days. A unique reproductive strategy is cooperative breeding: offspring from previous broods often remain with the parents for up to a year, helping to defend the territory and feed the new chicks. Chicks are precocial, leaving the nest within days to follow parents, but they are dependent on adults for food and protection for several months before gradually dispersing.

Alimentation

The Red-legged Seriema is an opportunistic carnivore and insectivore, with a diet heavily centered on large insects like grasshoppers, beetles, and caterpillars, which it hunts by stalking through grasslands and scrub. It also preys on small vertebrates, including lizards, snakes, frogs, rodents, and even other birds, often stunning them by beating them against the ground or hurling them onto rocks. One of its most fascinating dietary habits is its method of hunting snakes: the seriema will stomp on its prey to pin it down, then use its powerful beak to deliver a crushing blow to the head or repeatedly smash the snake against a hard surface until it is dead. Additionally, it occasionally supplements its diet with fruits, seeds, and tender plant shoots, particularly during the dry season when animal prey is scarcer.

Couleurs

The Red-legged Seriema has a predominantly pale gray-brown body, a lighter throat and chest, and a distinctive reddish-orange bill and long, vivid red legs. Its most unique feature is a crest of stiff, forward-curving feathers at the base of the bill, tipped with black, and its face has bare blue skin around the eyes. The overall muted coloration provides camouflage in the dry grasslands and scrub of South America, while the bright legs are a striking contrast but are often hidden when the bird is sitting.

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