User blog comment:PitchBlack696/Zinogre/@comment-117.2.34.142-20100907041309/@comment-117.2.33.183-20100909055152

I think jinouga may be an acient monster that not evolve its wing, or vice vesa , a flying wyvern that evolve to adapt to living in the ground and can not fly. Kinda like this : Flying wyvern -> Pseudo wyvern -> fanged beast wyvern, and vice vesa