The difference between male peacock and female peacock are:

Male peacock

  • It is bigger in size.
Male Peacock With Feathers In Full Strut | Flickr - Photo Sharing!

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  • The tail feathers are very conspicuous and beautiful with special markings.
  • On the head, a conspicuous crown is present

 

Female peacock

  • It is smaller in size.
  • The tail feathers are absent.
  • On the head, the crown is very small.