Draw a long, slightly curved central shaft
Add a pointed oval shape around the shaft for the feather outline
Sketch short diagonal lines branching from the shaft on both sides
Make the lines shorter toward the tip and longer near the middle
Curve the branching lines slightly to match the feather shape
Add a few irregular gaps to make the feather look natural
Refine the outer edge into a soft, tapered point
Erase extra guide lines
Darken the main shaft and outer contour
Add light shading along one side for depth