The Primary Study on Territories of White-Naped Cranes

The territories and territorial behavior of Grus vipio were studied in Lindian County of Heilongjiang province from March to May,1986-1988.Eight territories were investigated.The result shows that each breedingpair have successively occupied the same territory for many years.During pre-incubation,the average size of territory is 7.0 km.On the proceeding of breeding of most period,the size of the territory were gradually reduced to 1.5 square km.Not until nestling period.The territories of most of the cranes include a little crop fiel as fixed foraging field,which are smaller than the territories not containing crop field.