A semiplume feather looks like it is a blend of a contour feather and a down feather. Like a contour feather it has a supportive shaft, but like a down feather it has filamentary branches (barbs) and branchlets (barbules).
A semiplume feather looks like it is a blend of a contour feather and a down feather. Like a contour feather it has a supportive shaft, but like a down feather it has filamentary branches (barbs) and branchlets (barbules).