Flamingos are highly social birds requiring large group housing for welfare. Their unique biology and social complexity make them demanding but rewarding zoo species.
Flamingo welfare in captivity is strongly dependent on flock size and social complexity. Small groups of flamingos cannot express the coordinated display behaviours that are central to flamingo social life — breeding, flock cohesion and individual recognition all require the stimulus of a sufficiently large group. Welfare assessments should include behavioural observation of display frequency, flock cohesion and reproductive success as positive welfare indicators. Dietary management to provide appropriate carotenoid levels maintains both physical health and the pink coloration that signals good condition to conspecifics. Zoos with fewer than twenty individuals should collaborate with others to transfer animals and create viable welfare-appropriate group sizes.