For bird lovers, one of the most prestigious events is called “A Big Year.” It’s really an informal competition. “A Big Year is a rather insane undertaking.” That’s former Denver Post reporter Mark Obmascik. His 2003 book about the event is now being turned into a movie.  The cast includes some big names... Steven Martin, Anjelica Huston, and Jack Black. Obmascik was on Colorado Matters when his book, “The Big Year” first hit shelves. And he told us how the competition works.