Ключевые слова: anatomy, animals, background, beak, biology, bird, blackboard, board, chalkboard, clutch, crosshatch, design, drawing, egg, engrave, engraving, etching, fauna, feather, flying, goiter, habitat, hand, handdrawn, hatch, hatching, illustration, image, isolated, line, lineart, migration, molting, nature, nest, ornithologist, painting, pen, pencil, retro, sky, style, tail, vintage, wild, wildlife, wings, zoology,