This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). The parents will also pick up and drop food items in front of the chicks, presumably to encourage feeding. The young are precocial and follow both parents who offer some food to the young for 60 to 75 days. They are nidifugous (young leave the nest immediately after birth) and can run as soon as they are hatched. When the young screamers hatch their eyes are open and they are covered with down. Horned screamer females usually incubate the eggs during the day, taking short breaks when the male takes over.
Both parents spend time incubating the eggs. Two to eight smooth yellowish-white oval eggs are laid at intervals of 35 to 40 hours by the female. Nests are near or in marshy vegetation in shallow water, typically around eight centimeters deep.
This species builds large nests of plant materials, such as reeds and sticks, that are 8 to 10 centimeters deep. When large flocks of non-breeding birds are sighted it suggests that maturation has been delayed for several years. Horned screamers are year-round breeders with no particular breeding season. During copulation, which takes place on land, males will mount females for ten seconds while grabbing the female’s neck with his bill and flapping both wings slowly. After circling, males will bow their head 1 to 3 times in front of females. Males will use the sharp spurs on their wings as weapons against one another.īefore copulation males walks around females with their bills pressed downward against their inflated crops, neck retracted, and dorsal feathers partially erected. Often times there are fights connected with pair formation. The main courtship behavior, done all year long, is known as ?social preening.? This occurs when two birds preen the feathers on each other’s necks and heads. There are different mating behaviors, ?head bobbing? occurs when one screamer approaches its partner and both birds stretch their necks out and bob their heads up and down one to three times. Pairs stay together throughout the year, seeking isolation in marshy areas in late winter and early spring to trumpet in duets. Horned screamers pair for life, or for at least several years.
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