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 resolved." A DVD was released in 2010, coinciding with a world tour, and then the film was released theatrically in 2017, premiering in New York City. The film has a score of 79 on Metacritic, indicating generally favorable reviews. Commenting on the 2017 re-release, "The New York Times" said that Palmer captured the tour with a 'keen eye." The film was described as " a worthy time capsule and a must for Cohen devotees," with "occasional meanderings into artiness." Leonard Cohen: Bird on a Wire Leonard Cohen: Bird on a Wire, originally titled Bird on a Wire, is a 1974