Sinornithosaurus form from those found on birds from the same geological deposits. The body (contour) feathers were generally between 3-4.5 cm long and included two types: the first type are formed of several filaments joined together into "tufts", similar to modern down feathers. The second type, including those on the arms, were composed of rows of filaments ("barbs") joined together along a main shaft ("rachis"), making them similar in structure to modern bird feathers. However, unlike the wing feathers of flying birds, they did not have the secondary branches with tiny little hooks ("barbules") that flight feathers have, which allow the
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