Pterodaustro was a genus of pterosaurs that is believed to have filter-fed with a “tooth comb”. Like flamingos (who also filter-feed), the Pterodaustro’s proposed color would be caused by its diet, which likely consisted mainly of crustaceans and other small creatures
Because of its tiny focken legs, it might’ve had some difficulty flying, unlike other pterosaurs
I like how this is an excellent example of convergent evolution. Of animals from vastly different genii taking on similar appearances due to occupying similar niches.
w.r.t. the filter-feeding, it’s even vastly different classes (possibly phyla) – baleen whales, various fishes, krill, etc.