Research on the Relationship between Migration of the Birds of Prey and Climate in the Seaboard of Eastern China

The migration of the birds of prey has a close relation with the climate through our observation in Laotieshan, Dalian City, Dahiesh-andao, Changdao County, Shandong Province and Fushan, Qingdao from 1986 to 1987. The key reason that force the birds of prey to move to the warm south is that the seasonal change of the climate resulted in autumn. The birds of prey prefer to move in a northwest or south wind that is above 14km per hour. It is the very day or the following day after the pushing through of the cold front on the ground that this kind of atmospheric circulation will show itself on the weather map. The main feature of the weather prior to the going through of the cold front is the coming of south and southwest wind with the rise of temperature. After the cold front, it changes to west and northwest wind with the declination of air temperature and increase of atmospheric pressure and acceleration of wind speed. Big flocks of birds will get through under the weather of northwest wind, the wind force is 30~40 km per hour, so that we can forecast the migration of the birds of prey according to the weather changing patterns worked out in this research work.