Black-and-white seagull

A "black-and-white seagull" is like a "white crow", but a seagull. Therefore, it is black, unlike other normal white gulls, i.e. it is also white, but it is called black because it is unusual. By analogy with the so-called "white crow" - "black seagull". I see, right? It would be more correct to call, of course, a seagull with unusual behavior a "white crow". But agree, it would be strange. Therefore, the "black seagull". Or maybe its a crow depicted, just white, so-called albino crows. Too small - not visible.
Is it really nonsense?)

From the series "Circles of Testaments"
Oil on canvas on cardboard, 30cm