A night bird

夜猫子

【说明】有些雀鸟喜欢夜间活动

【例句】1。Rock used to be a night bird but since he married a year ago,he has become a family man. 罗基以前是个夜猫子，但自从一年前他结婚后，就变成住家男人

【补充】a jail bird 囚犯 When the boss discovered that the clerk used to be a jail bird he dismissed him at once. 上司发现那位职员以前曾是囚犯，就立即把他解雇了。