Feather These barbules have minute hooks called barbicels for cross-attachment. Down feathers are fluffy because they lack barbicels, so the barbules float free of each other, allowing the down to trap air and provide excellent thermal insulation. At the base of the feather, the rachis expands to form the hollow tubular "calamus" (or quill) which inserts into a follicle in the skin. The basal part of the calamus is without vanes. This part is embedded within the skin follicle and has an opening at the base (proximal umbilicus) and a small opening on the side (distal umbilicus). Hatchling birds of some
I Am a Bird Now following people contributed to "I Am a Bird Now:" !scope="row"|Worldwide I Am a Bird Now I Am a Bird Now is the second album by New York City band Antony and the Johnsons. It won the Mercury Prize on September 6, 2005. After winning the prize, the album shot up the UK albums chart from #135 to #16 in one week, the biggest jump in the history of the Mercury Music Prize. As of September 2011, UK sales stand at 220,000 copies. The album features guest appearances by Rufus Wainwright ("What Can I Do?"), Devendra Banhart, Joan Wasser and by