Pennaceous feather Pennaceous feather The pennaceous feather is a type of feather present in most modern birds and in some other species of maniraptoriform dinosaurs. A pennaceous feather has a stalk or quill. Its basal part, called a "calamus", is embedded in the skin. The calamus is hollow and has pith formed from the dry remains of the feather pulp, and the calamus opens below by an "inferior umbilicus" and above by a "superior umbilicus". The stalk above the calamus is a solid "rachis" having an umbilical groove on its underside. Pennaceous feathers have a rachis with "vanes" or "vaxillum " spreading
Bird on a Wire (film) various ways by the animals. Wounded, Rick winds up suspended over a tiger in a pit, requiring Marianne to save him. Not quite able to reach him, he offers her the extra incentive of marriage and children, which does the trick. They are then seen boating into the sunset in the Caribbean. "Bird on a Wire" gained a mixed to negative reception. The film holds a 32% rating on Rotten Tomatoes, based on 22 reviews. Audiences polled by CinemaScore gave the film an average grade of "B+" on an A+ to F scale. "Bird on a Wire" debuted at #1