Which extinct ducks could fly?

We’re all familiar with flightless birds: ostriches, emus, penguins — and ducks? Ducks and geese have been especially prone to becoming flightless over the course of evolutionary history, but it can be difficult to determine from fossils whether an extinct species could fly or not. A new study takes a fresh approach, classifying species as flightless or not based on their skeletons and offering a glimpse into the lives of these extinct waterfowl.
Paleontology News — ScienceDaily