ocr: INCUBATION TAKING TURNS YOUNG BIRD needs warmth to develop. In domestic fowl (chickens), only - - This is supplied by its parents, which the ben incubates the eg. In incubate (sit on) the eggs. Incubation does many other take species, turns. both parents not have to begin when the eggs are laid. But once it has started, the eggs cannot be left for long, or the developing young will die. EGG ROLLING Hen moves eggs to keep each one at the right temperature
