Read the passage given below and pick the option that best fits the question that follows:
Popular illusions about birds extend further than the use of the word 'egg-shape' that would suggest that all eggs are alike. For instance, there is the popular idea that owls hoot. Actually, only very few owls hoot and these include the common brown or tawny wood owl. The white barn owl screeches; the little owl has a wailing cry, the long-eared owl barks; and the short-eared owl snorts! Another mistaken idea is that all ducks 'quack' because
the common farmyard duck is a domesticated form of the common wild duck or mallard that quacks. Actually
, most wild ducks call with whistles.
The common duck is not a separate species but a tamed version of the wild variety because it: