A recent report on the western bluebird stated: “Genetic studies showed that 45 per cent of nests had young that were not fathered by the defending male, and that 19 per cent of all the young were fathered outside the pair bond.” Our feathered friends do not have access to an affordable, reliable way to identify paternal lineages on their own. Philadelphians, however, do. Over the counter DNA paternity tests are now available at Philadelphia......