MIGRATORY ORIENTATION IN INDIGO BUNTING PASSERINA CYANEA .I. EVIDENCE FOR USE OF CELESTIAL CUES
MIGRATORY ORIENTATION IN INDIGO BUNTING PASSERINA CYANEA .I. EVIDENCE FOR USE OF CELESTIAL CUES
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作者：
EMLEN, ST
在自然夜空下的室外和罗伯特T。1964年秋季和1965年春季和秋季的朗威天文馆。在这3个季节中，从23种不同的鸟类中获得了总共33次鸟类会议的数据。在这些情况下，24（73%），鸟类表现出一致的倾向，方向适当的迁徙季节的问题，随机结果，在另外8例。在夜空下表现出方向偏好的个体在为当地条件设置的人造天象仪天空下继续正确定向，当天象仪天空的南北轴颠倒180度时，将这个方向颠倒，当星星关闭并且圆顶漫射照明时，失去了所有定向能力。这些结果支持了靛蓝彩旗鸟能够从星空中获得方向信息的假设。
The "Zugunruhe" orientation of caged Indigo Buntings was tested both outdoors under the natural night sky and inside the Robert T. Longway Planetarium in the fall of 1964 and the spring and fall of 1965. During these 3 seasons, data were obtained from 23 different birds for a total of 33 bird-sessions. In 24 of these cases (73%), the birds displayed a consistent tendency to orient in the direction appropriate for the migration season in question; random results were obtained in an additional 8 cases. The individuals demonstrating directional preference under the night sky continued to orient correctly under artificial planetarium skies set for local conditions, reversed this direction when the north-south axis of the planetarium sky was reversed 180 degrees, and lost all ability to orient when the stars were turned off and the dome diffusely illuminated. These results support the hypothesis that indigo buntings are able to obtain directional information from the starry sky.