A lokacin da "jirgin kasa" ya fara a gaskiya an yi shi ne daga cikin manya elongated babba wutsiya maida hankali ne akan. A "jirgin kasa" a gaskiya ya fara da yawa daga cikin manya elongated babba wutsiya maida hankali ne akan. The wutsiya kanta ne launin ruwan kasa da kuma takaice kamar yadda a cikin peahen. A launuka sakamakon ba daga wani kore ko blue pigments amma daga micro-tsarin gashinsa da kuma sakamakon gani mamaki. Jirgin kasa dogon gashinsa (da tarsal spurs) na namiji ci gaba ne kawai bayan na biyu shekara na rayuwa. A arewacin Indiya, wadannan fara zuwa Fabrairu da kuma kowane suna moulted a karshen watan Agusta.
Fabrairu