Vibations And Touch In Birds
Some birds also have large numbers of vibration sensors called Herbot's corpuscles located in their legs. These allow them to detect the approach of other birds or predators along both the ground and on the limbs of trees. Herbot's corpuscles have also come to play a role in the nuptial displays of certain species of grouse. This ability to detect very faint vibrations has also been suggested as a reason why birds seem to know when an earthquake is about to happen before we humans have any idea about it.