Guilford said pigeons use their own navigational system when doing long-distance trips or when a bird does a journey for the first time.
Guilford said pigeons use their own navigational system when doing long-distance trips or when a bird does a journey for the first time.
吉尔福德说鸽子在长途飞行或者第一次飞行新航线时依靠的是它们自身的导航系统。