Pink! (It must be Christmas).

Flamigos at 'Little Lake' off Lake Naivasha in the Great Rift Valley, Kenya.

Invertebrate zooplankton colour the feathers via a vitamin A precursor- canthaxanthin. Some lakes have a different selection of plankton which add little or no colour. These birds seem to have been coloring up quite nicely on what they are eating (filtering actually....).