Dove Tail
What does a tapered tail do for a bird?
I am doing a report on the mourning dove:
How does the mourning dove's tapered tail help it?
Like our hair and fingernails, feathers are made of a protein called keratin. A feather has a central shaft, with many parallel branches called barbs on both sides. On many feathers, such as flight and TAIL feathers, each barb has small barbules and even smaller barbicels with hooklets, tiny parts that interlock to keep the surface of the feather smooth and weatherproof.
In most birds, feathers grow out of little pits in the skin called follicles. Follicles form neat rows in patches called feather tracts. Feathers grow in thickly and overlap so no skin shows.
As a feather begins to grow within a covering called a sheath, it develops its central shaft, color, and pattern. Blood vessels nourish the growing feather until it is fully formed, then the blood vessels wither away. The sheath bursts open and falls off, or the bird removes the sheath with its beak.
A bird can move each of its feathers independently, using tiny muscles in the skin. This helps a bird place its wing feathers, for example, into position to make a turn or slow down.
Every bird has several different types of feathers. Each has a different function:
CONTOUR feathers on body, wing, and TAIL give a bird a streamlined shape and allow it to fly. A single contour feather may be made up of a million small parts.
Flight feathers are extra strong in ducks, geese, swans, and a few other birds. They have specially shaped barbs that help keep the feathers from being driven apart by wind, making them more suitable for high-speed travel. Unlike other feathers, secondary flight feathers attach directly to the wing bone. This adds stability for flight control.
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MLCS Woodworking Through Dovetail Templates
