Feather development non-nervous. They have a tubular central shaft called the rachis; coming off either side of the rachis are the veins, which have a series of barbs with interlocking connections that are called barbules. The rachis and attached veins make up the spathe. The opposite of the rachis is the calamus, which anchors the feather to the body and is moved by attached dermal muscles. There are many different types of feathers that mostly follow this basic design with few variations based on evolutionary needs. Feathers are sometimes referred to as “elaborate reptile scales” just as birds are sometimes viewed as
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