One such theory is that constant contact with the water on a flamingo’s skin has the same result that it would have on a person’s hands or feet, causing the skin to pucker and “prune” and become uncomfortable for them. This theory could explain why flamingos alternate between their legs, to give each one proper time to dry before moving to the other.
Another theory states that the flamingo stands on one leg during sleep because it shuts off half of its brain – a behavior that is actually somewhat common in the animal kingdom. According to this theory, one half of the brain stays awake – the side with the leg the bird is standing on – and one half goes to sleep – the side with the leg the bird is holding up.
Additional theories involve the flamingo’s circulation – a flamingo keeps one leg up so that the heart has less work to do in pumping blood to the lower extremities. Along these lines, as some flamingos live in cold weather climates, these colorful birds may just be holding one leg close to the body in order to keep warm. However, because so many flamingos also live in warm climates, this theory doesn’t hold up very well amongst scientists.
One of the more reputable theories states that the flamingo does this for camouflage – keeping only one leg in the water gives the bird the appearance of being a small tree or reed, at least from below the surface. The problem is that none of these theories can currently be proved, and none is more likely to be true than the others. It’s even possible that the real reason flamingos stand on one leg hasn’t even been thought of yet – only time and further research will tell.
An Everglades National Park boat tour is an excellent opportunity to spot one of these birds for yourself, though where there is one flamingo, there are usually many others, as these birds typical stay in groups. Everglades City airboat tours give locals and tourists plenty of chances to see this interesting species in its natural habitat, so if none of these theories satisfies your curiosity, you can always develop a theory or two of your own.