Bird eggs are usually laid in a <answer>nest</answer>. Most species create somewhat elaborate <answer>nest</answer>s, which can be cups, domes, plates, beds scrapes, mounds, or burrows. Some bird <answer>nest</answer>s, however, are extremely primitive; albatross <answer>nest</answer>s are no more than a scrape on the ground. Most birds build <answer>nest</answer>s in sheltered, hidden areas to avoid predation, but large or colonial birds—which are more capable of defence—may build more open <answer>nest</answer>s. During <answer>nest</answer> construction, some species seek out plant matter from plants with parasite-reducing toxins to improve chick survival, and feathers are often used for <answer>nest</answer> insulation. Some bird species have no <answer>nest</answer>s; the cliff-<answer>nest</answer>ing common guillemot lays its eggs on bare rock, and male emperor penguins keep eggs between their body and feet. The absence of <answer>nest</answer>s is especially prevalent in ground-<answer>nest</answer>ing species where the newly hatched young are precocial.
Where do birds usually lay their eggs?
nest