Seriema age of four to five months. It is unknown when fledged chicks reach sexual maturity. There are two living species of seriemas. The red-legged seriema, or crested cariama ("Cariama cristata") is found from eastern Brazil, to central Argentina. It is bigger and nests on the ground or in bushes or trees up to above the ground. The black-legged seriema ("Chunga burmeisteri") is found in northwest Argentina and Paraguay. It nests in trees. These birds are thought to be the closest living relatives of a group of gigantic (up to tall) carnivorous "terror birds", the phorusrhacids, which are known from fossils
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