Create a beautiful black and white vector illustration in detailed pencil sketch style featuring a mother duck swimming with her ducklings following behind. The entire composition must be rendered in pure monochrome without any color, using only black lines on white background. Develop intricate feather patterns through careful cross-hatching that follows the natural direction of plumage. Show realistic water ripples and reflections using parallel curved lines and stippling techniques. Capture the protective pose of the mother duck with her ducklings clustered close by in the water. Include fine details in the webbed feet visible beneath the water surface using lighter line work. The composition should create a sense of peaceful movement across the water. Use varying line weights to distinguish foreground elements from background. The artistic style should evoke vintage ornithological illustrations with scientific accuracy and artistic beauty