Common pochard mainly due to urbanization of the natural habitats and their transformation, as well as due to overhunting. The pochard is one of the species to which the "Agreement on the Conservation of African-Eurasian Migratory Waterbirds" (AEWA) applies. Common pochard The common pochard (; "Aythya ferina") is a medium-sized diving duck. The scientific name is derived from Greek " aithuia" an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin "ferina", "wild game", from "ferus", "wild". The adult male has a long dark bill with a grey band, a red head and neck, a black breast, red eyes and
What is a Masterpiece? confluence of memories and emotions forming a single idea", that it has "a power of recreating traditional forms so that they become expressive of an artist's own epoch and yet keep a relationship to the past". The highest masterpieces are said to be "illustrations of great themes." Clark also implicitly excluded the erotic from considerations of what constituted a masterpiece, based on his perspective that a necessary condition is the balance between sense and form (works that are too sensual are, therefore, unbalanced and not to be categorised at masterpiece level). What is a Masterpiece? What is a Masterpiece? is