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
Leonard Cohen: Bird on a Wire Leonard Cohen: Bird on a Wire Leonard Cohen: Bird on a Wire, originally titled Bird on a Wire, is a 1974 documentary that chronicles a troubled 1972 concert tour of Europe and Israel by the Canadian singer and songwriter Leonard Cohen. It was directed by British filmmaker Tony Palmer, with cinematography by Les Young. The film takes its name from the Cohen song "Bird on the Wire". The film, after extensive re-editing from its initial version, opened in London in 1974. It was shown on German television, but it disappeared for decades and was considered a lost film. Its original