PROLONGED SPRING MIGRATION IN THE RED-EYED VIREO (VIREO OLIVACEUS)
PROLONGED SPRING MIGRATION IN THE RED-EYED VIREO (VIREO OLIVACEUS)
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DOI：
10.1525/auk.2013.12213
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发表时间：
2013-04-01
期刊：
影响因子：
2.8
通讯作者：
Stutchbury, Bridget J. M.
中科院分区：
文献类型：
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作者：
Gallo, Paul A.;Morton, Eugene S.;Stutchbury, Bridget J. M.
利用档案地理定位器对红眼鸟（Vireo olivaceus）的迁徙进行了跟踪，确定了红眼鸟的重要停留和越冬区域。来自同一个繁殖地（n = 10）的所有个体都在南美洲西北部一个森林茂密的地区越冬，并且在春天使用一致的路线，从尤卡坦半岛穿过墨西哥湾到达路易斯安那州。它们的春季迁徙速度（146公里/天（-1））比南美洲地理定位器追踪的大多数其他鸣禽（约280公里/天（-1））要慢。在春季迁徙开始后不久，红眼病毒在哥伦比亚的停留时间出乎意料地长（平均+/- SD =18.6 +/- 4.9天），我们认为该地区可能为后续更快速的迁徙提供重要的水果资源。春季迁徙的总时间平均为45.9±4.6天，但个体在平均13天的飞行中完成了大约6600公里的旅程。雄蝶到达繁殖地的时间为15天，到达日期与离开南美越冬地的日期显著相关（r = 0.81, P = 0.002），考虑到中途停留的时间长且多变，这是令人惊讶的。更有趣的是，南美洲的秋季到达日期与个体在春季离开的时间显着相关，这表明一些鸟类全年都有早或晚的时间表。
We used archival geolocators to track the migration of Red-eyed Vireos (Vireo olivaceus), abundant forest songbirds with significantly increasing breeding-population trends, to identify important stopover and wintering regions. All individuals from a single breeding site (n = 10) wintered in northwestern South America, an extensively forested region, and in spring used a consistent route, crossing the Gulf of Mexico from the Yucatan to Louisiana. Their spring migration rate (146 km day(-1)) was slower than that of most other songbirds tracked with geolocators from South America (>280 km day(-1)). Red-eyed Vireos had an unexpectedly prolonged stopover (mean +/- SD =18.6 +/- 4.9 days) in Colombia soon after the onset of spring migration, and we suggest that this area may provide important fruit resources for fueling subsequent, more rapid, migration. The total duration of spring migration averaged 45.9 +/- 4.6 days, but individuals covered the journey of similar to 6,600 km in an average of only 13 days of flight. Males arrived at the breeding site over a 15-day period, and arrival date was significantly correlated with departure date from the wintering site in South America (r = 0.81, P = 0.002), which is surprising, considering the prolonged and variable durations of stopovers en route. Even more intriguing, fall arrival date in South America was significantly correlated with individual departure in spring, which suggests that some birds are on year-round early-versus-late schedules.