Why did  Lord Sree Krishna wear

the  crest of peacock.?

Lord Sree Krishna was the incornation of

 Sree Maha Vishnuh. Sree Krishna is the

 Sampoorna Avatara (perfect incarnation)  what the

Bhagavatam says. 

The God is Askhalita Brahmachari. 

 He always used to wear the creast of Peacock.

In the universe , the Peacock only the creature

which   does not have the carnal enjoyment. 

When it sees the Peahen

 then the male peacock spreads its crest and dances.

 At the moment the  drops from its eyes fall ,

then the she  peahen dinks  the

eye drops and becomes pregnant. 

Lord Sree krishna has sixteen thousand Gopikas . 

He played rasaleela with them  ( the dance of Sri Krishna with

Gopikas at Brindavanam). 

The Lord played with them and  did  naughtiness. 

Just upto that only,  he acted. This symbolize

the creast which he wore on his head. 

But the Lord Sree Krishna was not a Bhogi

(He was not a pleasure-seeker) but 

He was Yogeeswara (a real Ascetic).

He looks like a Bhogi but He was a Yogi.  

The meaning for wearing that Crest of Peacock,

which symbolize that He

behaves and moves about with all others by his

devotional love which is pure and sacred.

The perfect meaning  of

  that can be seen in every aspect.  And also

 the  Gopikas were the sages (Rishis) in the Tretayuga.

Here  the Peacock is symbol for the purity.  

Hence  that Peacock has become our Nation’s National Bird.