Chilean flamingos live in large flocks in the wild and require crowded conditions to stimulate breeding. During breeding season, males and females display a variety of behaviors to attract mates, including head flagging — swiveling their heads from side-to-side in tandem — and wing salutes, where the wings are repeatedly opened and closed. Flamingos in general have a poor record of successful breeding because they will delay reproduction until the environmental conditions are favorable for breeding.
Males and females co-operate in building a pillar-shaped mud nest, and both incubate the egg laid by the female. Both parents also take turns incubating the egg. Upon hatching, the chicks have gray plumage; They do not gain the typical pink adult coloration for 2-3 years. Both male and female flamingos can produce a nutritious milk-like substance in their crop gland to feed their young.
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