Feather development grows, its spathe, which is where the rachis and vanes attach, continues to form. When spathe is finished developing, the calamus begins to form within the base of the spathe. The calamus is the quill of the feather, which is the bottom portion that stays mainly within the pulp cavity. From there, the feather is fully developed and will remain as such until molting occurs, causing it to fall off. Feathers fall off during molting, which occurs in the at different times through the year depending on the type of bird. Birds can molt for seasonal, reproductive and many other
A Bird in a Guilty Cage A Bird in a Guilty Cage A Bird in a Guilty Cage is a 1952 "Looney Tunes" animated short featuring Sylvester and Tweety. The title is a pun on the song "A Bird in a Gilded Cage". Sylvester is at a store called Stacy's, where he notices Tweety in the window stand. Going through the package slot, he closes the curtains and climbs up to Tweety's cage, who asks him what he's going to do. After asiding to the audience, "How naive can ya get?", Sylvester replies that they're going to play a game called Sandwich, involving Tweety getting sandwiched