You only need a piece of paper, scissors, and glue for this — really! Start by folding a piece of beak-colored paper in half. Cut a triangle with the fold along what'll be the top ridgeline of the beak. Trim your folded beak piece to shape and round the corners a bit.
If you want your beak at more of a jaunty, upright angle, try changing the angle of the short side, as shown below. In that photo, the folds of the two beaks are at the top. The top beak has the same angle as the one I'm wearing; the bottom will point the beak a bit more skyward.