Lorenz studied instinctive behavior in animals , especially in greylag geese and jackdaws .
劳伦兹研究了动物的本能行为，重点研究了是灰鹅和寒鸦。
In greylag geese it is the male-male pair bonds that persist and remain stable from year to year .
在灰雁，雄性伴侣的连结是年复一年持续且依然稳定的。
The ethologist konrad lorenz described the sunken eyes and hunched posture of newly bereft graylag geese : " a greylag goose that has lost its partner shows all the symptoms described in young human children . "
