Filter-feeding pterosaurs were the flamingos of the Late Jurassic
Modern flamingos employ filter feeding and their feces are, as a result, rich in remains of microscopically-small aquatic prey. Very similar contents have been found in more than 150-million-year-old pterosaur droppings. This represents the first direct evidence of filter-feeding in Late Jurassic pterosaurs and demonstrates that their diet and feeding environment were similar to those of modern flamingos.
Paleontology News — ScienceDaily