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首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Evidence for a navigational map stretching across the continental U.S. in a migratory songbird
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Evidence for a navigational map stretching across the continental U.S. in a migratory songbird

机译：一张迁徙鸣鸟中横跨美国大陆的导航地图的证据

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摘要

Billions of songbirds migrate several thousand kilometers from breeding to wintering grounds and are challenged with crossing ecological barriers and facing displacement by winds along the route. A satisfactory explanation of long-distance animal navigation is still lacking, partly because of limitations on field-based study. The navigational tasks faced by adults and juveniles differ fundamentally, because only adults migrate toward wintering grounds known from the previous year. Here, we show by radio tracking from small aircraft that only adult, and not juvenile, long-distance migrating white-crowned sparrows rapidly recognize and correct for a continent-wide displacement of 3,700 km from the west coast of North America to previously unvisited areas on the east coast. These results show that the learned navigational map used by adult long-distance migratory songbirds extends at least on a continental scale. The juveniles with less experience rely on their innate program to find their distant wintering areas and continue to migrate in the innate direction without correcting for displacement.
机译：数十亿只鸣禽从繁殖地迁徙到越冬地，并受到越过生态屏障的挑战，并面临沿途风向的迁移。仍然缺乏对长距离动物航行的令人满意的解释，部分原因是基于野外研究的局限性。成年人和青少年面临的航行任务根本不同，因为只有成年人才向往年已知的越冬地迁移。在这里，我们通过小型飞机的无线电跟踪显示，只有成年而不是少年的长距离迁徙的白冠麻雀可以迅速识别并纠正从北美西海岸到先前未曾到过的区域3,700公里的大洲位移在东海岸。这些结果表明，成年长途迁徙鸣禽使用的学到的导航图至少在大陆范围内扩展。经验较少的少年依靠其先天计划找到较远的越冬地区，并继续沿先天方向迁移而无需校正位移。

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