Because they have long necks and long legs and stand around in shallow water you would think that flamingos are related to herons, but they’re not.
DNA sequencing has shown that the flamingos’ closest relatives are grebes.
Read more about their amazing relationship in this vintage article:
(photos from Wikimedia Commons and Steve Gosser; click on the captions to see the originals)
Unrelated to the post but possibly of interest.
Fossilized insect from 100 million years ago is oldest record of primitive bee with pollen
Etc.