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
This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul This Bird Has Flown – A 40th Anniversary Tribute to the Beatles' Rubber Soul is a tribute album by a variety of artists that commemorates the 40th anniversary of the release of the Beatles' 1965 album "Rubber Soul". It was released on October 25, 2005 by Razor & Tie. It follows the track listing of the UK version of the album, although the two songs added to the American release are available as bonus tracks on iTunes Music Store. Writing for Allmusic, music critic Stephen Thomas