Naming conventions...

Male birds are nearly always called cocks, and female birds called hens. So, you have turkey cock/turkey hen, peacock/peahen, blackbird cock/blackbird hen.

There are some exceptions, e.g. birds of prey, where the male is a tiercel, and the female still a hen (a tiercel eagle, a hen-eagle), or swans, where the male is a cob, and the female is a pen (but this may originate from regional dialect variations).

Rooster is an alternative to chicken cock, mainly used in North America. This is a relatively new word, possibly coined to get around the sexual connatations of the word 'cock'.

Hope this helps...

BTW, it is so, so sad that I know things like this... ;)

TTFN,

Tril.