Peacocks (by Emam Ali p.b.u.h):

The most amazing among them in its creation is the Peacock, which Allah has created in the most symmetrical dimensions, and arranged its hues in the best arrangement with wings whose ends are interleaved together, and whose tail is long.

When it moves to its female it spreads out its folded tail and raises it up so as to cast a shade over its head, as if it were the sail of a boat being pulled by the sailor...

It feels proud of its colours and swaggers with its movements.

 It copulates like the cocks.

It leaps (on the female) for fecundation like lustful energetic men at the time of fighting.

I am telling you all this from observation, unlike he who narrates on the basis of weak authority, as for example , the belief of some people that it fecundates the female by a tear which flows from its eyes and when it stops on the edges of the eyelids the female swallows it and …