Why is peacock the national bird of India?

In 1963, the peacock was declared the National Bird of India because of its rich religious and legendary involvement in Indian traditions. The criteria for this choice were many. The bird must be well-distributed within the country so it could truly 'national'.

It must be recognisable to the common man. It must lend itself to formal depiction, i.e. abstract depiction on government publications, etc. It must not be confused with the bird emblem of any other nation. It should be associated with Indian myths and legends. The peacock fit the bill.