A genetic study of 169 bird species has shown that some birds are not what we think:
Grebes, a type of diving bird, are not related to loons, as ornithologists had long believed. Surprisingly, grebes appear closely related to flamingos.Another item for the "the more we learn, the more we realize how wrong we were" files.
The analysis also showed falcons are more closely related to parrots than to other hunters such as hawks and eagles. If true, the finding would mean that falcons do not even belong in the scientific order originally named for them.