雄
I tell the males apart.
私は雄を見分けます
I tell the males apart accurately.
私は雄を正確に見分けます
I tell the males apart from the females accurately.
私は雄を雌と正確に見分けます
I tell the young males apart from the females accurately.
私は若い雄を雌と正確に見分けます
I tell the young males apart from the females accurately by the color of their feathers.
私は羽の色を見て若い雄を雌と正確に見分けます