Ключевые слова: animal, baltic sea clutch, batch eggs, bird, breeding, build nest, clutch, clutch eggs, down, dry grass, duck, egg, egg laying, female cell, fluff, fowl, fuzz, hen fruit, l, laying eggs, locule, loculus, make nest, mallard, mallards nest, mollard duck, nature, nest, nest made, nesting birds, nestle, nestling bird, nidificate, nidify, nidus, nine, nine eggs, ovicell, ovum, replication, reproduction, reproduction birds, sea, semiaquatic birds, shell egg, shore, soft down, spring, summer, volplane, water bird, waterfowl, weave nest, white eggs, wild duck, wildlife,