What is the meaning of a bird on a coat of arms?
A Martlet or Swallow means 'one who has been dispossessed of land', or the sign of a fourth son.
An Eagle means 'a protector, a person of action, noble, power and strength'.
A Peacock signifies beauty and pride.
A Swan is a sign of a musical person, of poetry and harmony.
A Dove naturally means love and peace.
The Eagle has the presumed ability to stare at the sun without becoming blind and this became a source of metaphors.
The pelican was supposed to be able to open its breast with its
beak to feed it's young in times of great distress, so it became a
symbol of generosity, parental devotion and redemption. Its
generally represented in the act of feeding it's young.
Why was the bald eagle chosen as the national bird of the US and the golden eagle chosen for the Mexican coat of arms?
The Commonwealth Coat of Arms is the formal symbol of the Commonwealth of Australia that signifies Commonwealth authority and ownership. The Commonwealth Coat of Arms is used by Australian Government departments and agencies, statutory and non-statutory authorities, the Parliament and Commonwealth courts and tribunals.