Quite a few species of the next major avialan lineage to diversify, the Euornithes (indicating "correct birds", because they incorporate the ancestors of modern birds), ended up semi-aquatic and specialised in consuming fish and various tiny aquatic organisms. Feathers currently being vital to the survival of the bird, involve servicing. http://martinqerjv.tinyblogging.com/kingfisher-for-Dummies-18487838