My mother and her family are zoroastrians by birth through generations. Still close to zoroastrian community & traditions. I was writing previous comments from personal experience as well.
Mithraism is the only ‘religion’ that came before zoroastrianism. Zurvan & manicheanism both came after. There is no concept of ‘peacock worship’ in Z faith; nor in mithraism. Most Yazidi beliefs (theologically) are quite foreign to zoroastrians.
This link is from 2011 mostly about zoroastrianism.
http://www.freerepublic.com/focus/f-religion/2717607/posts#44
Actually, whilst the peacock is a fairly popular animal in persian history and we often see it in persian paintings particularly post-islam, it originated from india & is an indian influence. Including ‘the Peacock Throne’ which was brought to iran over from india during a muslim dynasty (Nader Shah) in iran. Though am not suggesting it is a hindu religious tradition.
Further elaboration:
“Peacock
Ancient Greeks believed that the flesh of peafowl did not decay after death, and so it became a symbol of immortality. This symbolism was adopted by early Christianity, and thus many early Christian paintings and mosaics show the peacock. The peacock is still used in the Easter season especially in the east.[22] The “eyes” in the peacock’s tail feathers symbolise the all-seeing God and - in some interpretations - the Church. A peacock drinking from a vase is used as a symbol of a Christian believer drinking from the waters of eternal life. The peacock can also symbolise the cosmos if one interprets its tail with its many “eyes” as the vault of heaven dotted by the sun, moon, and stars. By adoption of old Persian and Babylonian symbolism, in which the peacock was associated with Paradise and the Tree of Life, the bird is again associated with immortality. In Christian iconography the peacock is often depicted next to the Tree of Life.”
http://en.wikipedia.org/wiki/Christian_symbolism
http://themeaningofsymbols.blogspot.com.au/2009/03/peacock-symbolism.html
http://www.jesuswalk.com/christian-symbols/peacock.htm
http://www.catholic-saints.info/catholic-symbols/peacock-christian-symbol.htm