
Seriemas breed during the rainy season which varies based on the region in which the birds live.

Their vocalizations are a series of loud, high-pitched yelps, and will use them regularly to respond to other pairs in nearby territories. They are territorial and call, often performing a duet with a partner, in the mornings. They only fly when required to avoid predators or to perch on tree branches. Seriemas spend most of their time walking through grasses and scrublands in pair or small groups while looking for food. They will frequent areas that have recently been burned by fire to gain easy access to prey. While they are most commonly found in grassy savannas, they can also be found at elevations as high as 6500 feet (2000 m) above sea level. They are among the largest ground-dwelling bird in the Neotropics, second only to Rheas.

They can be found as far south as Paraguay, Uruguay, and northern Argentina.

Red-legged Seriemas live in the dry, open grasslands and scrub habitat of central and eastern Brazil to eastern Bolivia.
