Måsen was released in the year 1973。Måsen is also called as Jonathan Livingston Seagull, Möwe Jonathan, Lokki Joonatan, Juan Salvador Gaviota, Gabbiano Jonathan Livingston, Fernão Capelo Gaivota, A História de Fernão Capelo Gaivota。

Jonathan is sick and tired of the boring life in his sea-gull clan. He rather experiments with new, always more daring flying techniques. Since he doesn't fit in, the elders expel him from the clan. So he sets out to discover the world beyond the horizon in quest for wisdom.

Måsen actors and actresses include David Ladd, Hal Holbrook, Juliet Mills, Richard Crenna。