Why flamingos are pink

A flamingo feeds with its head upside down. The bent bill is a pump and a sieve. The bird draws water in and pushes it out through comb-like plates, trapping tiny shrimp, algae, and other particles.

Those foods contain carotenoid pigments, related to the pigments that colour carrots and autumn leaves. The bird absorbs the pigments and deposits them in growing feathers, skin, and even the yolk of its eggs.

A filter, not a spear

A chick hatches grey or white. It turns pink only as it eats the same foods as the adults. In a collection, keepers supply a diet that includes those pigments, or the birds fade towards white.

Greater flamingos turn up in southern Europe, Africa, and Asia, including on salt lagoons. They are wading birds, with long legs that keep the body above the shallow water where they feed.

The colour is in the diet

The famous one-legged stance is a resting posture. Tucking the other leg into the feathers cuts heat loss. Flamingos also live in large groups, and the group is part of how they breed and watch for danger.

Not every pink bird got its colour this way. A roseate spoonbill is pink for a similar dietary reason. A robin’s orange-red breast is a different pigment story, built into the feather as it grows, and is not a filter-feeding trick.

A filter, not a spear

Flamingos are not born pink. The colour comes from pigments in the food they filter from the water. A flamingo feeds with its head upside down. The bent bill is a pump and a sieve.

Put those two statements side by side. The first sets the condition. The second says what happens once that condition is met. Why flamingos are pink needs both. Drop the first and the second has nothing to explain. Drop the second and the first is only the scene.

The colour is in the diet

The bent bill is a pump and a sieve. The bird draws water in and pushes it out through comb-like plates, trapping tiny shrimp, algae, and other particles.

The order is the explanation. What the first sentence names has to be there before the result in the second sentence can show up. The piece does not ask you to accept the result first and hunt for a cause afterwards.

A check you can make

The bird draws water in and pushes it out through comb-like plates, trapping tiny shrimp, algae, and other particles. Those foods contain carotenoid pigments, related to the pigments that colour carrots and autumn leaves.

A fair check is sequential. Confirm the first statement. Then see whether the second is the result of it, rather than a separate fact parked in the same piece. If the result shows up without the condition, this account does not cover what you are looking at.

The limit of the claim

Those foods contain carotenoid pigments, related to the pigments that colour carrots and autumn leaves. The bird absorbs the pigments and deposits them in growing feathers, skin, and even the yolk of its eggs.

The two statements do different jobs. One says what is there, what it is made of, or what acts on it. The other says the change that follows. The title names the change. It is not an inventory of parts.

The same steps, in order

The bird absorbs the pigments and deposits them in growing feathers, skin, and even the yolk of its eggs. A chick hatches grey or white.

Nothing in the second statement cancels the first. It carries the first forward or marks the limit of it. Remember only the result, and the cause goes missing. Remember only the cause, and you will not know what the piece says happens next.

Why the order matters

A chick hatches grey or white. It turns pink only as it eats the same foods as the adults.

Read them as one path. Start at the first full stop and do not skip to the outcome. The words between the two statements are the mechanism. The title is the name of that path, not a second claim.