Arid
DOI10.5253/078.097.0304
Daily travel schedules of adult Eurasian Hobbies Falco subbuteo - variability in flight hours and migration speed along the route
Strandberg, Roine; Klaassen, Raymond H. G.; Olofsson, Patrik; Alerstam, Thomas
通讯作者Strandberg, Roine
来源期刊ARDEA
ISSN0373-2266
出版年2009
卷号97期号:3页码:287-295
英文摘要

We analysed satellite tracking data to reveal the daily travel schedules of Hobbies Falco subbuteo migrating between northern Europe and southern Africa. By comparing movements during short-time intervals of 1-8 h at different times of the day between the three different regions Europe, Sahara Desert and tropical Africa, we found significant higher hourly speeds in the Sahara compared to the other two regions. The migration started early in the morning and continued throughout the day, resulting in daily travel time exceeding that of typical thermal soaring migrants. Due to fast hourly speeds in combination with the long travel days during Sahara crossings, the Hobbies exceeded daily travel distances recorded for soaring migrants. In Europe and tropical Africa, the speed was highly variable during the day, and lower flight speeds, especially during afternoons, suggest a fly-and-forage strategy, Our predictions about regular occurrence of nocturnal flight especially across geographical barriers as the desert were not fulfilled. In the Sahara, the Hobbies restricted their movement to diurnal migration. Nevertheless, 10% of the flight segments in tropical Africa were partly or completely during night hours and Hobbies often started their daily flight before or at sunrise. We attribute the special characteristics of the daily travel schedules of Hobbies primarily to their use of a fly-and-forage strategy, possibly in combination with preparedness for exploiting thermals during the daily thermal time window. Further studies are needed to understand why Hobbies do not increase daily travelling hours to include regular nocturnal flight in the Sahara Desert. We suggest that the daily travel schedules of the Hobby, which were distinctly different from those of other diurnal migrants like large raptors (which mainly exploit thermal soaring migration) or pipits, wagtails, finches and pigeons (which mainly travel during the morning hours) may be typical for bird species that primarily use a fly-and-forage migration strategy.


英文关键词migration satellite tracking Eurasian Hobby daily travel schedules fly-and-forage strategy
类型Article
语种英语
国家Sweden
收录类别SCI-E
WOS记录号WOS:000272403600006
WOS关键词OSPREYS PANDION-HALIAETUS ; SATELLITE TRACKING ; AUTUMN MIGRATION ; LEVANT SPARROWHAWKS ; BIRD MIGRATION ; SAHARA ; AFRICA ; SWEDEN ; RADAR ; STRATEGIES
WOS类目Ornithology
WOS研究方向Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/159811
作者单位Lund Univ, Dept Anim Ecol, SE-22362 Lund, Sweden
推荐引用方式
GB/T 7714
Strandberg, Roine,Klaassen, Raymond H. G.,Olofsson, Patrik,et al. Daily travel schedules of adult Eurasian Hobbies Falco subbuteo - variability in flight hours and migration speed along the route[J],2009,97(3):287-295.
APA Strandberg, Roine,Klaassen, Raymond H. G.,Olofsson, Patrik,&Alerstam, Thomas.(2009).Daily travel schedules of adult Eurasian Hobbies Falco subbuteo - variability in flight hours and migration speed along the route.ARDEA,97(3),287-295.
MLA Strandberg, Roine,et al."Daily travel schedules of adult Eurasian Hobbies Falco subbuteo - variability in flight hours and migration speed along the route".ARDEA 97.3(2009):287-295.
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