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The Southern Screamer belongs to the Order of Anseriformes. Its diet consists of plants stems, seeds, leaves, and, rarely, small animals. It is about 3.5 foot long and lives in swamps, estuaries and pool coasts. The Southern Screamer is a good swimmer but prefers to move on the ground. The bony spurs on their wings are used for protection against rival screamers and other enemies. Although it is non-migratory, it is an excellent flier. They are normally seen in pairs but sometimes gather in large groups if there is a food in one place. It establishes monogamous relationships that last a lifetime. Its lifespan is estimated to be 15 years. For the nest the couple makes a big platform of reeds, straws and other aquatic plants, in inaccessible places. The female lays between two and seven white eggs. Incubation takes 43 to 46 days and the couple take turns during this period. The chicks leave the nest as soon as they break the eggshell but the parents take care of them for several weeks. The fledging period takes 8 to 14 weeks.
El Chajá pertenece al Orden de los Anseriformes. Su dieta consiste en tallos, semillas, hojas y raramente animales pequeñs. Mide casi un metro y vive en pantanos, estuarios y bañados. Es un gran nadador pero prefiere movilizarse en el suelo. Los estolones óseos en sus alas son utilizados para protejerse de otros congéneres rivales y enemigos. Pese a no ser migratorio, es un excelente volador. Se los normalmente de a pares pero a veces se reúnen en grupos si existe comida en un sólo sitio. Establece relaciones monogámicas que duran toda su vida. El promedio de ésta es estimada en alrededor de 15 años. Para el nido la pareja realiza una gran plataforma de juncos, paja y plantas acuáticas en lugares bastante inaccesibles. La hembra pone entre dos y siete huevos blancos cuya incubación es de 43 a 46 días, tomando turnos con el macho. Los polluelos abandonan el nido apenas rompen el cascarón pero sus padres los cuidan fervorosamente por varias semanas. Su desarrollo les tomará de 8 a 14 semanas.

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